If I need to go fast I go ride with the cars and trucks and not the baby strollers, dogs or walkers. I hit the MUP for a mile to wind down my ride that is otherwise on street. It is the most deadly mile I ride because I never know what to expect. Especially from those cyclist that must be training for a race from the way they ride on it.
I just remember every other MUP user has priority over my bicycling and deal with it.