Hotkey issue with xbox controllers

For people who have controllers that are missing their bumpers; I have an idea. Its called a way to change the hotkeys so that way we can use or abilities in combat. I know it sounds like a dumb idea but if you add it in i will play a whole lot more because i cant deal with the slow paced gameplay of me missing my left bumper. If anyone reads this id appreciate feedback or someting to be done.