These threads aren't really useful but I wanted to make some vaguely-related points:
1. I think "forced diversity" or "diversity for its own sake" actually do exist, though not nearly as much as online commenters would have you believe. We've all seen situations where a non-white character is unconvincingly shoved into a group where it doesn't seem like they would realistically be (in Marvel, this goes back as far as the Howling Commandos), or where the princess suddenly knows martial arts because it's politically incorrect for her to be rescued. The thing is that there are no rules for what makes something feel forced, it's all in the execution, and that means it's one of those things we truly can't judge without seeing the end result. Riri may sound like a forced idea, but a lot of superheroes started with forced concepts. It really is all in the execution or one of Marvel's top characters now wouldn't be Deadpool.
2. There may be an extra layer of fear now that fans have that their favorite characters won't come back because of the increased political scrutiny. What I mean is, when you had a legacy character before, it was normal to wait a while until the familiar character got back his (usually his) title. Because of the politicized nature of much press coverage lately, fans may worry that it will be un-PC for their favorites to come back. So if Rhodey became Iron Man today, there might be a lot of political backlash against putting Tony Back in the suit. I think this worry is way overblown: DC brought back the old Wally West and didn't care that a few people online called it racist. I don't think fear of being called racist affects the companies as much as fans believe it does. I just wonder if that's not part of what makes old-school fans so paranoid sometimes.
3. I notice a lot of complaints - maybe not so much here, but elsewhere - about "forced" diversity are not so much about the comics themselves as the self-congratulatory interviews and press coverage, where Marvel credits itself for its daring in diversifying its universe in a superficial way (still not so much political or religious diversity among characters), or the think pieces that imply that "representation" is some kind of simple binary. This kind of coverage is annoying, but works of are don't deserve to be blamed for the stupid things that are written about them. In other words, never mind all the press releases, is Ms. Marvel/Kamala a good character (and I think most people agree she is)?
4. Finally, one thing I've noticed that makes legacy characters better for me is if they respect the established characters. Sometimes a writer will have a legacy character or a new character show up and be better at everything than the old characters, or act openly "rebellious" with them. That makes it hard for me to take their side, because the familiar characters are like my friends, and I want them to be respected. I think one of the secrets to Kamala's success is that she is such a fan of the established characters, which means we can easily identify with her.