I would like for the xp system to change on the story mode and for levels to not be closed off once you finish insane mode on them. I think we should be able to go back and simple choose which mode we want to fight and get xp in a exponentially decaying pattern based on level.

Oops, I accidentally voted yes to 2 instead of yes to both; I think BigDaddy22 suggested something similar to this. I agree, the single player needs to be able to have more options once you complete it, but it isn't necessarily the highest priority for the game.