My only argument with that Boone (with which I largely agree) is that Gruden was hired ostensibly because of his QB expertise. If Griff alone had performed poorly, I would be more than willing to put the blame mostly, if not completely, on Griff's shoulders. But all three have looked progressively worse the longer they have played under Gruden. In fact, the only QB that has looked serviceable under Gruden is Dalton, and I don't think he is available.
Gruden has demonstrated time and again that we (generally, and Snyder specifically) SHOULD question his judgment, which includes his judgment about QBs. He has been a MAJOR disappointment across the board. If they decide to allow him one year, I could live with that, I suppose, though I would be pretty unenthusiastic. I don't think the man has what it takes to succeed here. As others say with RGIII, I think he very well could succeed elsewhere with a more stable, "normal" front office and talent evaluation process in place. But that isn't what we have here.
Bottom line for me is that in order to succeed here, a coach is going to have to be extraordinary, particularly when it comes to leadership. Gruden isn't. I don't see him working, and I don't mind moving on from him because of it.