This may seem like a strange thing to want but I think it would be fun to replace Tidus and Yuna (in gameplay other than blitzball and not in cutscenes) with Jecht and High Summoner Braska respectivly. Then also replace Auron with his younger model when he was killed by Yunalesca. I have no idea how possible this may or may not be considering that every time I try to do as much as put Jecht's Sword or even the Buster Sword causes the game to either crash or lockup. But I figured the idea was worth putting out there for people to think about. It would be interesting to say the least in my opinion.