Trust me, I'm aware.... this conversation has been covered endlessly since he was drafted.
First of all, even before Harris was brought in, we have seen in a couple of cases (Parker Meadows and Wenceel Perez most notably) prospects who were written off have some of their stock recovered, and that Garko and others may have had a hand in that. (Certainly Stavenhagen and others seem to think this is the case)
Second, just because the administration is new doesn't mean that they shouldn't be afforded time or some faith to implement their program. As much as people gripe about Pizza Jr., I'm pretty sure he didn't hire the guy with the expectation that he would be a failure.
They have had a lot of turnover in their medical and strength and conditioning staffs since Harris took over.... this was widely reported at the time.