Yeah, ironically enough, the area that IV and V seemed to have handled better is DLC. Time wise comparative, they both had way more costumes and released way more characters by mid-season 2 than VI is right now.
I was speaking with a friend of mine recently about this and he states that it's due to 6 development team emphasising a stronger focus on character balance and aesthetic design to not having all the weird clipping issues that previous game did. To some level, that makes some sense, but I feel like with the RE engine acclaimed to being so adaptable to deal with, at least the costume shyts seems like that'd be more plentiful by now. By season 2 of SFV, Chun-li alone must've had like, no less than...900 thousand costumes, which is like 1200 thousand adjusted for inflation.
If anything, they should at least have multiple, universal theme costumes for each character by now. Like, do you want my fukking money or what, Capcom?! And I'm still not with only 4 characters per season, I don't care for what reason. Especially with half of them being guest charaters, that's treason.