Comment by SliceOfWaifu

You just said yourself that doing them frame perfect yields a better version of the move. The input is difficult because of the potential reward. It's like doing perfect EWGFs in Tekken. I played Ivy in SoulCalibur II, and could do the Summon Suffering input pretty consistently if I buffered it during another attack. It led to a fun mixup since the other player would hear my joystick switches actuating as I did the motion, and crouch to avoid the throw. Instead of finishing the input, I'd hit them with her 2 A+B overhead instead. God, I love SCII. It's a shame the sequels kept trying to reinvent the wheel with the gameplay.