Thanks for sharing.
I never really had a problem with how Lorna getting on the team in-universe played out. I disagree with his assertion about that being a "very Polaris move," but I think it works in a purely practical writing sense. It gives an in-universe explanation for Marvel's out-of-universe past refusal to use and respect Lorna, without making other characters look bad in the process. Lorna wanting to join, talking herself out of it but Jean going with her first impulse reopened more of a friendship bridge for them, and it's better than an alternative scenario where Lorna doesn't want to join but feels obligated. Still would've preferred Lorna simply wanting to be on it with no doubts, but how it turned out was okay and provided some future opportunities.
Assuming the talk of revelation is true, I have something to say on that. He was talking about the election there and Lorna winning it. We don't know by how many votes or what margin. But if the outcome genuinely was a revelation - if the prospect of Lorna winning seemed that unlikely to them - then it shows a massive gap between what they see and think when they look at her, and what everyone else sees. There were a lot of complaints even as the vote happened that having Lorna on the poll meant none of the other characters stood a chance. Many of those complaints referred to her as a B-lister or even an A-lister. Being surprised about her win means they underestimated her worth, her potential, and reader interest in her.
The big question is if they still underestimate her. If you asked me last summer when the new run launched, I'd have said that I thought maybe they weren't underestimating her anymore. But today, with most of Lorna's time on the run behind us (they haven't announced her off the team after the Gala but it's obvious she will be), nothing tangibly impactful to show for it and what appears to be a slow-moving push by Marvel to "replace" her with Brand, I have to say they still underestimate her. There's been good moments, no bad ones in his run that I can recall, and Duggan's done better than any 616 writer in the past decade. But it doesn't look to me like Marvel's attitude toward Lorna has really changed following the revelation. It looks to me more like they're just trying to run out the clock and give just enough to satisfy people while figuring another green-haired woman with a close working relationship with Magneto will siphon interest from Lorna in a way where they can discard and ignore her.
Lastly, Duggan said something else in the podcast: focus when working on the comics. He said his primary audience is Pepe, followed by the editors, then essentially "if they're happy with it then the readers have a good shot at enjoying it too." I don't fault him for this perspective. He's a working writer. He needs to satisfy his coworkers and employers first and foremost. If you don't do that, then at best you'll have strained working relationships, at worst you might never get work with them again. It's the life of making that your career and not having enough money and prestige (at least yet) to do otherwise. But it means exactly what it says on the tin. A writer might absolutely adore a character, know exactly what that character needs and deserves and want to do it. The writer could have a gold mine of a plan that would give the comics obscene amounts of money and clout. None of it matters, though, if people they work for are against the character or have a certain vision of the character that overrides the character's true worth and potential.
The comics aren't really doing things based on maximizing the X-books' potential. They're doing things based on what most satisfies the people working there. People working there may claim they're the same thing, they may even sincerely believe it, but they're really not. A goal of maximizing potential means regularly questioning assumptions, deconstructing tropes, acknowledging crucial history and using even obscure characters where it should happen, etc. Not necessarily explicitly, but at least in the background to inform plans. A goal of self-satisfaction means just using whichever characters you like the most and finding ways to put them all over the place even if it doesn't make sense and ignores other important things that need to be done.