A pity that this move is very reactable and linear. highly punishable if stepped, and just as much if blocked (-22). 40 dmg with no guaranteed follow up doesn't justify this risk. And since it can so easily be reacted to (i33), it's hard to condition opponent to do anything with it. At first you have the surprise factor of using a prep move on neutral, but once that's gone this move is just as useless as prep A+B.
Isn't it better to just input 4 and whiff punish rather than use 3A+B:5? The backstep on that move isn't too great, It's high risk for low reward, and there's always the problem of execution, especially when you're under pressure.
Well you have a point there. I don't think doing Prep A+B from neutral is that great. Prep A+B could be better but I think "useless" is a bit too extreme. Prep A+B is meant to be comboed after 66B for the most damage.