You can also shimmy backwards and do a b+A and try to catch their poke. Especially crazy in the corner.
As far as I can tell, DeGrey is all about:
Jump-in (A, B, or C), then AA, C, B -> mixup. The "correct" button after this sequence is A, but the alternative paths are:
B - Beats pokes if spaced well
C - Beats jump + all moves
Nothing - Beats everything?!
After doing nothing, you can Throw the opponent, go for a counter-hit setup with b+A, or REALLY punish them with Super.
But I haven't played a lot of DeGrey so this is just Day 1 Tech.