[SSJKarma]

what you are basically asking is that spiderman has the ability to kick off attacks when the opponent is in range before they could do a super...

basically a bad idea... for around 2 reaseons that i can know of !
1 - he already see's the supers way before the screens pauses which makes him able to actually see the danger and let time for you to react.

2 - Its you who must react not the characters... after all its you who controls it not the other way around. thus when you see the danger, YOU gotta do something not him. if you can't super jump, throw a web ball or simply spidey kick the opponent in time then it is your fault not the characters fault.

those two reasons are enough to tell me this idea isn't good at all !
he's good the way he is now, let him be the way he is.