There are a few things about SRK in two buttons. You have autocorrect (which was stupid in SF4 also) and the reaction time. You can just be pressing down back and then DP all of a sudden with the press of two buttons.
It's not just SRK either. The roll is one of the weirdest additions. You can put someone in the corner then they can roll out. I don't mean to call out onemic but one of the questions he had in BB was "how do I get out in the corner? I don't have a roll." Sure, you can throw your opponent but in my opinion, it's an easy two button out.
The AOA is annoying too. Not only is it overhead, but it has super armor also. Yeah, it's slow before the SA kicks in but it's just two buttons for overhead. Sweep also to a lesser extent.
And because of these reasons, I think the game is a bit shallower than the other Arc games. I do get overwhelmed by the terminologies in GG, such as jump install, 1 frame jumps, frc's, etc. but it could be what GG players felt when going to BB. I think that BB is really deep but for GG players, it's a very simplified GG. To me, p4a is a very simplified BB and not in a good way.
I know some of you like the simplified buttons and argue that that's what makes it deep. I disagree in the fact that nobody should react the same way. For example, in the corner, your first thought shouldn't be "when can I roll so I can put my opponent in the corner?" It should be "what can I do in this certain situation that I can get out." There is a definite difference in those two sentences. The first one, ANY character, whether be Kanji or Yosuke, and no matter who your opponent is, can get out of. The second one, it depends who YOUR character is and who your OPPONENT's character is. You need to know what the options the other character has versus what your tools are to put it to your advantage. Again, I feel like it's an oversimplified method.
Don't get me wrong, at the core, the game is still extremely fun. The two buttons kinda annoy me and I cannot say it's a great game because of it. My gag reflexes doesn't kick in like when I think about Extend, but it's enough that I can critique about it. I guess at the bottom of it all, I'm trying to say is that while I do not enjoy it as much as some of you do because of the above reasons, there should be no reason why YOU shouldn't enjoy it because of my opinions.