They mentioned once that if they did speed run related content in the future, the reward would be strictly achievement related. So once you had pulled off a time trial in a specific place, you would not be forced to do it there again.

I DO like this concept, as it is a fair balance between all or none. That said, it has been over a year since they addressed the matter, I am anxious to see if they still have plans for this in the foreseeable future. I would be disappointed if they walk back these plans and eliminate such incentive-tied challenges.