I actually think Sub is very good. In the corner he gets a free 50/50 after every MB polar puncture restand. He still hits hard, hit confirming F22 into mb ice ball or burst on hit or block is really easy for good damage or the burst giving you good meter, the gap in between F22 and burst isn’t even that bad, it’s a trade at worst. He is hard to zone, does good damage(even if it is less), broke jump ins, good mixups in the corner, excellent corner game obviously, the second best F3 in the game, and clone is so good vs anyone without a good projectile. Sub’s actual weaknesses to me is that he has a bad back walk speed making it kind of awkward to play footsies sometimes and it’s hard to capitalize on plus frames because all of his fast buttons don’t lead to much since D1 only goes into burst on hit and has a big ass gap on block, and a terrible projectile. He just requires a lot of patience.
Regardless, even if I’m wrong and the character ends up being garbage, he’s who I like. I don’t play professionally, I just play for fun.