I generally skip it, but it's a good opportunity to take a deep breath.
Not if they go to PBGC they wont, which is a really good idea against a Valentine on top of you with j.MP usually.In a decent number of instances it would be worse because good players will naturally wait to pushblock once they see you are using j.mp. And it's a really early tick throw that will catch them off guard more than the full hits if you do it first. I also prefer the faster tempo of cancelling j.mp at the beginning of the match.
Also they won't be mashing a non-invincible assist unless they are god awful.
In a decent number of instances it would be worse because good players will naturally wait to pushblock once they see you are using j.mp. And it's a really early tick throw that will catch them off guard more than the full hits if you do it first. I also prefer the faster tempo of cancelling j.mp at the beginning of the match.
Also they won't be mashing a non-invincible assist unless they are god awful.
Just ilustrating what I said.