There’s a few things I’d do that I can think of off the top of my head. Firstly I’d make Chun-Li’s c.mk a link. Fair enough it’s a nice cancel, but she has far too much priority as it is. Restricting it to a link would require at least a little effort to use her effectively.
Secondly I’d give Ibuki normal stamina. She’s a great character imo, she has a lot of potential. But that damn stamina just ruins her completely. If she had the stamina of the twins or even Ken, it would improve her quite conciderably I think.
I’d also allow Makoto to block during Tanden. It’s a cool super imo, but the fact she can’t block just ruins it. I would make her meter longer though, the damage she does already with it is insane, if she could actually block it would be too short for what it is.
I can’t really think of much else now, I’m not trying to think of ways to bring the top tiers down, but bunch everyone else up to their level. Things like 3 Aegis or 2 Denjins I’m not too sure about, they’re pretty broken as it is and I think there could be better things done like damage tweaks etc. Some characters need their moves adjusted like Sean and Twelve, but I think recovery times and stamina etc will play the most part further down the list.