Oh, and since I almost never post here, let me say GG's to the various people I've been play a lot with recently: Leon Dangerous, Cass is Better (Niz), Hammertime (who is this out of curiosity?), lasercakes, swolf, and whoever else I played from this site we probably had good games.
Leon I really need to ask you for tips on how to stop getting raped by you.
Edit: I started reading the thread. So, A+B into A+B covers grab, mid speed highs (it shouldn't work against AA but then there is the pushback, it depends on the starting range but I wouldn't count on it), and opponent running in for grab/mid mixup. I apologize that its boosted online but to be honest there's enough blockstun that if you can't interrupt it with say Sieg 3B its partly your own fault. Unlike say Sieg 3B where I literally have 1-2 frames margin of error to punish, hmmm? It loses to any very fast high, or medium speed or better mids. The payoff from A+B on hit is almost 60 damage + a grab attempt, i.e. around 80 damage on normal hit. So, getting BB'ed for 30 damage isn't such a big deal. On the other hand, if you land this move once you will scare your opponent into NOT running in and trying to grab you. That's a big deal. Even attempting the move and failing, means the next time you land A+B on block its more likely your opponent just does a mid instead of running in and grabbing.
I think some people on 8wr take the "don't attack on - frames" stuff too much to heart, and just allow themselves to get super predictable. The people on 8wr who make me look silly (so far: Partisan, Static, Leon and Krayzie) use a combination of step, attacking at -frames, GI's, etc every single possible technique to make it very unclear what I should do after I have blocked their attack.
One way to take advantage of a player who is too predictable in respecting - frames is to grab. A player who never attacks at disadvantage gives you free reign to move around, = free reign to run in and grab. My match vs laser today I grabbed him like 5-6 times in one round, maybe more. On the other hand krayzie did exactly the same thing to me.
Frame data is important, but since every strategy can be beaten by some other strategy, the most important thing is not to be predictable. This is why Krayzie crushes me, and I crush some other players on this site: there is a big gap in how fast each player is adapting to counter the patterns that the other one is using.