I am not even getting the "let him pitch" folks. He has been losing control and velocity over the past 3-4 starts, and because he is a unique pitcher, he has, for the most part, gotten away with it. That said, look at Zimm last year to this year at the same time. Night and Day.
The other aspect of this is that the Nationals are showing parents of drafted pitchers and players that they care about the kids and are not going to toss them out like a used carcass when they break down. This is huge when you are drafting out of slot pitchers and quite frankly, sets a new standard, not only for baseball but for all sports - NCAA, NHL etc where kids are concerned.