The thought just came to me while I was doing my routine.
Would anyone be interested in seeing a Rival System for xbox fitness? For those of us with limited xbox fitness friends to play against, it seems like it would be kind of a cool dynamic to pepper in. Along side of "Average in your age group" "Your best" and "your highest rating", the system would select a random user with the same overall FP and progression, and pit you against him/her (Their user avatar displayed with added devil horns, or something similar).
Just a thought I wanted to throw on the table for a possible future update.