If you look at how these characters function as a whole, these are in my opinion the ones who felt like capcom butchered them including nash as well, but nash has very long normals and some of them are hard to punish, he can't just back away as much.
While Ken seems to lose his 3f jab combo starter that helped his v-skil game against slower reaction players and his counter hit with crouch 3f jab into target combo.
Mika lost a lot, including midscreen damage since she cannot use invisible wall anymore on top of her grab to do it being considerably much slower, she probably will have to use nadeshiko to get it, which is using her v-trigger.
Cammy a character with no overhead gets her best way to approach neutered.
But looking this from Ibuki's side, some of these universal nerfs might actually help her due her walkspeed, forcing throws to whiff which is practically her playground she can punish normals well, but if you get opened by a throw god help you.
Anyway, will be waiting for the official release, if this means i get to play my waifu from SFV in better conditions than before i'm down, she is fun, some characters were just super dumb, including Ken.