You know what else I just realized that's also killing me as I was thinking about how the base Marvel side isn't all that bad considering the X-men soft ban? Capcom side got NO redesigns. Captain America looks different (albeit worse), Iron Man looks different, Hawkeye looks different, Dr. Strange looks different, Rocket looks different, Thanos IS different... Most of the Marvel side look just slightly different enough to make you think they're not from the same game.
Capcom side... Idk. Admittedly, not too many of them have variations of the same character, but Chris could have easily been re6 or revelations without changing his moveset at all. Dante could have kept the moves but sported his older dmc1 attire. Give Haggar a shirt that he can rip off. Something to at least make them look as bitb different.
The horrible art direction shouldn't be the only way someone can tell the difference between 3 and I.
Also, Nemesis, Firebrand and Spencer all have pretty much nothing they can add in terms of personality to this game. Since Spencer isn't "rad" he's just gonna be another militant straight man like Chris that talks want good bionic arm all the time, and Firebrand/Nemesis don't speak.
They could have made them 2000x interesting if Spencer was his 80s stereotype, if Nemesis had like a speaker where someone like MODOK was monitoring Nemesis' actions and could communicate to the opponent (just imagine Nemesis getting hit and MODOK yelling at him like "you're putting all my modifications to waste!"), And gave Firebrand a really suave villain voice and made him sound dignified, like the type of villain to sip wine in an email later all relaxed like. Just a little bit to make the game more... Fun.