Why couldn't he play on the perimeter as a C? Meyers does it all the time. He could still pick n pop, and a lot of Portland's offense is symetrical, meaning there's no difference between PF or C (for example, all Horns sets are symmetrical, with 2 high posts and the play running based on the side of the entry pass. Portland does this a lot.)
Defensively, does it make a huge difference? Whats the harm in having him guard backup Cs instead of PFs? We still need to ein a couple games, he should play some C until we clinch the 3 seed.