(1) The controls...how easy would it be to give the player an option to swap the controls to WASD = move & JKLI = attacks?
(2) Getting hit one time stuns the protag for too long. Even a single punch does that. The enemy can easily string unblockable hits for the entire match. And they can punch you while you're laying down, also keeping you down, cause you can't get up while they're hitting you.
(3) All pump, no blow. Seriously...you don't cum? (or is that one special move cum and not pee? ..at which case it would be kinda messed up cause dude can just cum at will like that, but doesn't get the chance to blow while fucking her. lol)
(4) Uncensor it. I know...Japan...I get it. lol ... but an uncensored patch would be cool.
(5) Hell, why not add cheats, too? Every other fighter game has cheats. Why not this one, as well?
(6) If it's marked "COMPLETED", yet has sooooo many things that could be done (and NEED to be done), then maybe someone would be interested in modding it...as was mentioned above.
Alright...enough of my opinions. Back to our regularly scheduled programs.