Get rid of Squall, put in Ashe or Tifa. Hell yeah. But seriously, not sure. I'd probably get rid of Irvine because I never really cared for his character. Or perhaps Ultimecia for, you know, an opponent that actually shows more presence from the start of the game through to the finish, because I really don't like how unattached I was to the villain in this game. So maybe remove Ulti and put in Kefka.