You realize that there is more to playing center than faceoffs, right? And that Sharp isn't very good at those things? Here's a hint -- the next time you see Sharp playing center, watch his defensive coverage/positioning. It's not pretty.
If Sharp plays center, it opens up a spot on the wing for somebody to play on the 2nd line wing. It's essentially swapping Zeus out for Saad or somebody else. Big upgrade on 2nd line.