Status Quo Warrior? Hmm, I don't find that objectionable at all. The status quo is actually really good, better than it has ever been in the history of the world. Equality, for example, has never been as good as it is is now. But more to the point, I think Legacy Warrior would be closer to home. We want to keep and cherish our legacies and create new ones, we simply don't like people messing with the old legacies to the point where they don't even make sense anymore. Create your own legacies for any and every group, do a good job and they too will last decades. But try to distort our old, carefully crafted stories into something they are not, just for the fuck of it, with a preachy and dismissive attitude to boot, and we will be annoyed.
Brie Larson is not a problem because she is a woman, but because she is an obnoxious person. She came into the greatest movie franchise of all time spewing her politics, dissing the fan base, dissing the original team (who also don't seem to like her very much) and someone should have told her that that's really not the best approach to take, if you're trying to win over the fans' hearts and become the new leading face for the MCU. She's actually the polar opposite of Robert Downey Jr. in every way. RDJ had the charisma to pull off Iron Man so well, that on the back of the first film the whole MCU was possible to be built. He is also a fan favorite, and just a genuine and fun guy to be around. Brie Larson, not so much.
According to many sources, Disney seems to have picked up on that, and they seem to be quietly removing her from the spotlight in the Avengers. Maybe this Star Wars thing is the plan B for her, to see if she would work out there? Would make sense.