I know that without the game code the game can't be updated yada yada, but this is all about our own creative ideas, right? Let's keep sharing them, why not?
My idea? A search box for the character choosing screen. If you're anything like me, you have a TON of characters to scroll through just to get to the one you're looking for. Wouldn't it be easier to have a search function on the character page? You type in the character's name and that character comes up and is clickable? That would save a lot of time and hassle out of the selection especially for those with quite a few characters to choose from.