I think it would be really fun and rewarding to have a high score system put into place for each race category (ex: R-60, R-80, etc..). Maybe something like the top 3 fastest racers for the week get an MGP reward, and if you score in the top 10 you get a small bonus. The higher the Rating race, then the higher the reward.

A permanent high score would make things interesting as well. Maybe have a screen with weekly high scores on the left, permanent on the right. I'll leave that to the devs, but I think this would make chocobo racing a whole lot more interesting for people.