I'm a big fan of the arena challenge matches, and do a pretty good job of remembering what went wrong when you fail against an opponent, but it would be really great if at least the last fight was saved much like the arena matches, so that before going into the fight again, you can review what went wrong last time and potentially make adjustments.

Also, it would be pretty cool by the end to have a list of all the successful fights, maybe people could look at them when scouting you.