I don't agree with most here that starting McCown is a waste of time. It is not. We are developing a number of players, not just the QB position. We want to fully develop the right side of the O-line. We want to develop two young TE's in Seferian-Jenkins and Leggett. We want to continue to develop the young receiving core in Anderson, Peake, Stewart et al. And we also want to continue to develop the young studs on defense, namely Williams, Lee, Jenkins and the two rookie safeties.
That is best accomplished with a QB who is not a deer-in-the-headlights situation. McCown isn't much, but he has the right attitude (which Fitz did not have), seems to have a positive effect on the younger players and has decent talent (when healthy). He has never been able to stay healthy, so Hackenberg should see the field anyway. I just don't see him as a future starting QB, so for me the waste of time is just as much in the belief that Hackenberg is a franchise QB as it is playing a 38-year-old vet in a rebuilding year. For the QB position, it is less a rebuilding year as it is a place-holding year. There are several QB's better than Hackenberg in next year's draft.
Also, I honestly don't think we are going to be as bad as people suggest. And we will benefit in the long run from every victory this season, because aside from QB and possibly RB (though McGuire may surprise), we will be winning games with youth virtually everywhere. Our roster will gain invaluable experience this season, and set up a nice scenario next off-season when the focus will be on finding our future QB. Hopefully by then, most positions will be established (save for maybe center and running back).
So, that is how I see it. I am fully behind starting McCown for as long as he's healthy. Hackenberg can begin his role as an NFL backup QB. There is no shame in that. But that is his potential, IMO.