I think its a good idea. Marty can control the wearing down factor by making practices a little bit lighter, however its pretty big that instead of walking into the stadium and their players being like "holy **** its hot in here, how we gonna play in this??" the players will just be like "damn another hot day...lets get this over with"
Reduces the shock factor of playing in such massive heat and since their starting QB will likely be Joey Harrington a rookie who came from OREGON, that might be a good thing for them.