Back to the

+

, It's best against hop attacks specially if they aim to combo or pressure after, for they will try to do them deep and you'll snuff their attack. At worst it will whiff, your opponent will end up behind you and full punish, because if you don't cancel the recovery is awful, so always cancel into

+

on whiff or block. You'll be -7 as opposed to -18. Edit: I forgot that strike arch(

+

) has faster recovery when chained. It's either -3 or -4.
The positive of

+

is that it comes out fast and it moves you forward, but this is the main reason why it whiffs if you're in the corner when they do a normal jump. If they do a normal jump your timing has to be on point, otherwise you'll get crossed up and punished heavily.