What mechanics specifically? Not asking to be argumentative, just curious. There are a few things I'm not a huge fan of myself.
For me, I feel like blockstrings in general need some work. Not just AGohan/Cell stuff, but just in general. I dont think its not balanced or anything necessarily, it's just not enjoyable or particularly interesting to sit there while someone basically goes through a step-by-step showcase of their character's normals, then specials, then assists lol. Shrug.
I wish reflect worked a little differently. I dont know how precisely, just differently. Id like to see some kind of pushblock system, maybe tied to its own type of meter, or a limited number of uses, something like that. Change that and the blockstring/pressure stuff is fine. Reflect is just odd. Again, I dont know precisely what should be done, I just dont like its current implementation.
That's mostly it for me. SD is kinda dumb sometimes, but at the same time, its so easy to beat if its mis-used that usually when I get mad about it, I look back and realize I deserved to get opened up with it because I was sloppy, or the other guy just used it at a really good time/situation.
I’m curious as well.
Most people complain about the long safe block strings, but I suppose coming from UMK3 (yay I mentioned umk3 again, the Juggs classic) that I’m used to long, inescapable, block pressure. Except in that game, you can chip someone to death in the corner and they can’t get out of it, lol.
In other news, thanks to
@ShArp I’m gonna try out Kid Buu in place of Goku Black. Black is good but he doesn’t have crazy mixups like Kid Buu. I mean he has some with his instant transmission shenanigans, but those aren’t as good now that people know about it.
Oh and four character teams because then I wouldnt have to make difficult choices. lol.
And I agree, KB is more scaryer than A.gohan. Need to play more, have Been figuring out my third char coz Im rly bored to a.gohan. Maybe il pick Kid buu....... 
