Yes, and people debate the controversial opinions in this thread.
Not everything they do is a wise business decision, but phasing out the big names to give shots to a relative handful of characters who have been around almost as long as them is not much better. The industry struggles for a multitude of reasons, not just because they aren't telling enough good stories with the Fab 5. The comics are not as readily available to hook new generations of young readers, and they have to compete with a lot of other media that offers more bang for their buck. Not even Batman is as healthy as he could be if his comics weren't relegated only to dusty comic book shops.
Comics readers can complain about wanting new things all we want, but we ultimately prove to them that we want to read about our favorites over and over again. getting rid of the biggest generation is just gonna piss of their largest fanbase with no guarantee that they can get a new one into the comic shops to try out the rest.
Did Rucka want to use Donna more, or replace Diana with her altogether?
It's a sticking point because what has Donna done to deserve the WW mantle, especially now when Wonder Woman's fans are already pissed enough at DC for doing so little to capitalize her even with her movie? Those old stories, the accidental ones, are not canon anymore but they were actually closer to making sense than what we have now. She's gotten worse ever since. She hasn't contributed anything to the WW franchise, she mooches off of the brand.
I don't want Donna to be disenfranchised anymore and I want her sorted out once and for all. But to have her take on the mantle asking too much. What do the Diana fans get out of it?
It is not trivial at all. You're kidding yourself if you think Wally being a Silver Age sidekick who got promoted to the main hero didn't play a large part in his success. It certainly wasn't the only thing, but replacing one of their iconic heroes with a major supporting character probably played a part in Wally lasting longer in his role than Kyle or Connor.
He was deliberately created as part of the parent franchise. Donna was created by non WW writers and the WW franchise doesn't want her. It's pretty straightforward. Wally's long history with Barry gave him an advantage Donna didn't really have back then, let alone now. Barry as a commodity also wasn't what Wonder Woman is now, so phasing out Diana for Donna makes even less sense than it does already.
Yes, I have mixed feelings about Donna. I really liked her during pre-Crisis, so I will forever hold out hope she can be salvaged.
I don't know how many people feel that way though. Look how big the cinematic Marvel characters are now among kids, and most of them have been around since the Silver Age (Cap even longer). All of them are the same age as DC's all stars, who are themselves pretty beloved. Lots of little girls love Wonder Woman. I loved Batman when I was a child, and I love him still even though I'm approaching my 30s (ugh). I loved the Teen Titans when I watched the cartoon too. People relate to different things, and they don't always need to be the same age.
Dick Grayson is as old as my grandparents anyway.
And if they continued to use the same franchises just with different people behind the masks, they would be repackaging things just the same. It wouldn't be truly new ideas. We'd need another Silver Age Marvel type explosion to get that, as in brand new properties.
It does. It also requires endings. DC and Marvel are quite unlike other stories in that they are designed to be published indefinitely. How to you write progression if it's not progressing towards anything, and when the audience should really be aging out of the damn thing anyway?
Not everyone has the time or inclination to hunt down old stories. Or if they are interested in these characters, they may not want to have to deal with the older writing style.
People can also go read the older comics with the Fab 5 if they are so inclined.