Hmm after an overhead the SC don't let you combo if you hit your opponent in a back dash? The super whiffs ? Because i don't know the property of those moves very well ...
And i can't test by my own so ...
BTW the free juggle non ex move will be very powerful in this case, K' didn't have said his last word.
That's what I was trying to say: If you backdash on wakeup, you get knocked down again and you can recovery roll, but unless the move is like an anywhere juggle kind of move or it's counter hit, you might not get hit.
So it's a defensive option that's pretty viable on wake-up. Probably won't effect people like Clark who, if he guesses right, can just grab you anyway in the corner. However, it will make you consider your oki game a little because that's now an option.
Things like Iori's moves on wake-up will probably still catch you because his Maiden Masher can grab you out of the air when you hit them. Same for K' EX Chain Drive. Moves like Takuma's EX Haoshokoken will probably miss because the first hit knocked down. Ryo's overhead on wake-up or a low B's, will just knock people down and the opponent might go on autopilot. For example, if Terry does a usually blockstring, he'll include df+C in any of it. But df+C isn't safe on whiff and it'll definitely whiff if you knock someone down with a C or a D. Meanwhile, you're recovering. See how that can be kinda bad?
Might also be the case in frame traps too? I don't know if it's on recovery or at all times, but a 1 frame activation could mean you get out of frame trap strings with characters without one-frame moves.