I'd like to preface this post by saying in my mind you're the voice on these forums for Lois and someone I've come to respect a lot when you weigh in on how Lois is being used in the DC Universe. Furthermore, I agree with you with one major caveat.
They don't hand out a comment card that asks "why didn't you buy Superman this month" for us to say "because you marginalized Lois Lane. She's the best reporter in your universe, his wife, the mother of his child, arguably the first lady of comic books and she deserves a higher profile because of it. She also deserves her own book that isn't a goddamn pet project for Rucka to write about The Question. Lois Lane should be every young woman and journalist's favorite character and yet she's just a prop in recent media to turn Clark into a villain and everyone involved in that should be ashamed." Because let me tell you, despite how flippant I can be on these forums, I am livid with how her mini developed and overall how underutilized Lois Lane is.
They'll just think people don't care about Superman. Or maybe cosmic Superman. Perhaps Jon.
You've seen my posts. Everyone who has knows Lois is my favorite character after Clark and I hold their relationship very dear. I complain all the time when she's marginalized. If I didn't have House of El ordered (thus my shop committed to it for me), I wouldn't even buy it based on the idea that she's just "Wife #1, maybe the favorite, in a line of several." But at this point the book has been sold and I'd just be telling my shop I'm an asshole instead of them being able to tell DC "our big Superman guy doesn't like the direction of this." I'll express my concerns when I see them next, and if I'm lucky that will be relayed to DC, but that won't help much.
I asked PKJ on Twitter when the first news came out if he had any plans for Lois other than to be relegated to "Jon's mom" and didn't get a comment. As fans, without becoming toxic and brigading all discussion as Lois's Outraged Legion (I know, I know. I couldn't help myself because I'm a goofball at heart), that's about all we can do. Look at Jon's fans. They've boycotted Bendis and trash him on every turn but Jon's still aged up because the problem lies with someone who is ultimately a supporting cast member, not the hero. And that sucks for Jon fans. I know because I am one. Just as I'm a Lois fan. Until the book fully transitions to Jon's, the big message AT&T/DC will see with reducing sales to Superman is Superman doesn't sell. You're a fan and I know you know this stuff, but sometimes it can be easy to forget how the suits are parsing data. Maybe I'm just making an ass of myself for reiterating it all, and if so I deeply apologize.
But she is a supporting character, arguably the most important... But in cosmic stories, she's rightfully going to be downplayed because she just cannot go there outside of my silly idea for having her and Clark take a second honeymoon and breaking stories across the galaxy for fun. What's important is the context for how it happens, right? Does Clark just leave (BAD) or is he vaunted across the stars trying to get home (Good!)? The problem, of course, lies in her being on Earth with Jon who is Superman and yet, again, seemingly not involved. She's his mother so especially with Clark missing she should be extremely important. This is where I'm agreeing with you in sexism, perhaps not on PKJ's part but editorial for not pushing a larger role for her. I don't know PKJ and by all accounts he seems like a decent man, but DC editorial has a history and the bloodbath seems to not have changed it much.
And yet as a fan, there's no real correct answer to get Lois pushed because the best one was botched-- her series and GN just did not really sell. Everything else will be read as Superman's failure, not really anything to do with Lois Lane. Hell, I suggested giving Jon purple eyes and making him pick up a penchant for freshly squeezed orange juice (and coffee later in life) to give him his youthful energy so he can at least superficially pick up something from his mother.
The comic reading fandom isn't strong enough to get AT&T to levy interest. Arguably, Superman & Lois is probably the best place to do so. They're paying way more attention there and her name's in the title. That audience may have more power in getting Lois noticed again than comic fans ever will because her last series didn't sell much at all. Jimmy Olsen (admittedly the better book and all-around wonderful) at least had stellar reception and look who is announced to get the first backup. I don't know if it's just sexism (which is definitely a part of it) but I do think that's thanks in no small part to Rucka not getting edited strongly enough for them to remind him "this is not Rene's book. She leaves this issue. Focus on Lois" and the book got mired too much in everything but telling a Lois Lane story. I was excited when they announced him. He even wrote some stellar moments in that series... but after it, I just don't want him in charge of a Lois Lane project ever again. He's proved his comments on always being up to write Diana, Kate or Rene mean he'll sideline the title character to make it about Diana, Kate or Rene.
Its sales weren't good and it became instantly forgettable. All the messages going to the bean counters upstairs are that Lois doesn't sell or generate interest, so they're going to downplay her. We can be loud, but nothing's louder than a dollar with these people. Superman & Lois succeeding will show some interest, especially if Lois gets a lot of discussion/praise, but even so Clark and their kids will share some of that.
The biggest obstacles Lois faces unfortunately get buried under the larger issue: the Superman line struggles as a whole because DC doesn't get it. A lot of fans here hold Rebirth up to some sacred moment in time and yet it sidelined Lois and treated Clark like a co-lead to his son in a pretty uneven run (that I liked, mind you). I know Ascended likes to mention that Clark was OOC during that era because he normally isn't great with family and where I part with him is I liked to think he finally got it together with his own son (perhaps as a wakeup call), but it's also a fair criticism to say that Clark wasn't even himself in that run. Despite it all, the book wasn't killing it in sales.
Lois needs a better position but so do the books as a whole. The only real benefit I can see to any of this shakeup for her, and this is the thinnest silver lining I can muster, is that Lois and Clark will be able to get away from the burden of SUPERMAN for DC and just get to tell their own stories with less expectations because he's no longer the focus of the IP. I hate that. I absolutely hate it, but right now things are really bleak for Lois Lane and we haven't been giving a lot of info that tells me Clark's getting positioned to be the best Superman he can be, but to be the best bench warmer he can be for his son. The whole line is in a really big state of flux and that means the problems with Lois just aren't going to be addressed, and since that's been the case for 20+ years (the line being in flux) Lois just eternally gets put on the back burner. Much like everything in the Super books.
Berganza is gone, as is most the old blood, so I really hope this changes. I hope we see some stability for Supergirl. I hope Power Girl stops being treated like the redheaded stepchild of the Super family. I hope Lana is more than just diet Lois who sometimes tries to get Clark back. I hope they figure out how to reposition the women in these books to getting to be more prominent and successful and a big part of that is getting women working on these books. A firm, female editorial voice is a great idea that needs to happen. More women absolutely need to be involved. There's just no acceptable alternative to that fact.
Editorial is the problem. Outside of Jon, DC's biggest rising stars are Jessica Cruz, Jo Mullein and Naomi from Rebirth-onward. All POC women, two of which are LGBTQ+. They still push Harley excessively. Diana is getting a big editorial push even if her sales remain stagnant. The fans are due a fair chunk of blame, but I'd argue the Superman office's editorial department are the biggest reason she's hamstrung. Hell, they had Stepan Sejic admitting he wanted to so a Superman and Lois romance book but never got the opportunity before he dipped. Quite a few writers have noted they want to tackle Lois, or how much they love her. I saw more buzz about Lois than I did Jimmy before that book dropped. Sexism is definitely involved, but it's strongest at the middle stage and unfortunately it's hard to get the important people upstairs to notice. I don't think boycotting the Super books until Lois gets a prominent role will really do much other than relegate the Super books to their "assigned book ghetto" they've fallen into so many times before.