I loved the flawless block but I do think it needs to be toned down a bit. As I see, the purpose of the mechanic should be to deny + frames and punish virtually safe gaps, specials, and strings. But the difference between flawless block frame adv and regular block frame adv should not be as big as it was in this beta where you had + frames being full combo punished. It should only eat out 2-4 frames of recovery from the move you block, and only u3 should be able to be used as a reversal, this way you can contest pressure and punish some safeish moves without making the mechanic completely out of control.