i would say helpers are right that way but need some tweaks !
the choosing box is good idea !

spiral doesn't teleport you BEHIND only when you would end up off screen so she teleport you upward ! other than that she's more of an offensive helper ! (ever tryed her in a hadoken duel)

sentinel is a great helpers when you dont give them the choice. (get in him out then blast a hadoken right away the oppoent wont have much choice left =;-DD)

sakura,shuma,psylock,blanka = good defensive helper

venom = like guile he come out too slow, but unlike guile his venom fang goes way too far... so hes practicaly useless... unless you take him out for long ranged oppoenent who always use hadokens !?!

forget about it i just found is strong point !
but he need some speed tweaks !

guile = why is he saying sonic gapore ? it's sounding like singapour !

red sentinel = if we have it in the game then put him at 2 since he rushed into the opponent and he's massive and undodgeable !