Yeah, the MCU kind of has a drawback in that stagnates everything else. Like you'll get interesting stories or cool callbacks to old comics in the movies, but in the comics and other adaptations, everything is basically catering to be more like the movies, instead of their own thing.
Anyways, I've cooled off about the roster. I think the Marvel side is more or less fine given Marvel still being petty about the Fox stuff, though the Capcom side is pretty weird overall. One thing I do kind of wonder about people who complain about the Marvel side is what they would have gone with in a situation where you still have to have constraints. Prior to the full leak, I was dreading the idea Jill 3.0 in the form of Black Widow, and Star Lord with space guns, but in the end it was Ant-Man and Gamora who have much more interesting potential for movesets (though I'll also say there are probably better picks than Gamora like Ms. Marvel when it comes to movesets). And to that end, I wonder how people would spread things out if they could only have four newcomers or in the case of the Fox characters, how they would make a roster of 14 Marvel characters with four of them being newcomers. Prooooobably a lot of people axing Hawkeye and Nova.