Well, ideally you'd have more than one, but ok, maybe he's worse at taking instruction in a high pressure environment? Same thing applies.
I agree with Dropout, it's not saying this is definitely the case, just that it's something worth examining.
It's not as though Schar was dropped for being relentlessly shit, and I think most would agree it's the natural time to be looking at developing the future rather than wringing every last bit of juice out of our veterans. But in the short term we're at risk of losing certain things.