If you're staying in one of the wings that surrounds the pools, the good news is that you can take a stairwell down to ground level and at least cut a little time off of the walk to MGM.
The worst rooms, IMO, are those down near Jellyrolls. Far from MGM...far from Epcot...far from the lobby...far from the bus stop. Ugh! The only benefit there (and it's a small one) is that it's the closest area to the Swan. Sometimes theme park busses will stop at the Swan first and it's a pretty short walk over the bridge.