Id go with the 15 because a fighting game to me is all about roster quality, I usually go for more but in this case if I could pick my own 15 I would take it in a heart beat. Don't get me wrong the roster is decent right now but there's more characters right now that I wont/dont wanna use then ones that I will/want too
Well, let me note that roster quality was specifically stated in this hypothetical to not be affected by the amount of characters. They'd be just as good and unique with 30 as with 15. That's speaking purely on your use of the word quality, not on the rest of the comment (which I can understand completely).