Re: Avengers: Endgame (April 26th, 2019)
I think the key difference between Captain marvel and others you mentioned is endearment, at least for me personally in this movie. She just felt...I dunno...snarky & distant/disconnected from everyone? Didn't get that vibe in her solo film; in fact I loved her representation there and look forward to rewatching it many more times on home video. Maybe it's to do with Endgame being done first before the CM solo and brie still finding her way around this character at that point.
I think your last observation is partially correct, but I think it may have less to do with Brie's understanding of the character and more with the writers' understanding of how to use her. In the early part of the film she's the powerful newbie from space with no past relationship with the team, so coming off as disconnected makes sense. Then they have her leave again for the majority of the film, and when she finally does return at the end she's written primarily as a weapon. I'm not sure anyone would come off as endearing with that kind of character development.