So your knock on Grunk is that as a true freshman he couldn't beat out players that had three years in the system. Really.
Bottom line. The kid was a high 4 star, elite 11 talent coming out of high school. So its a given he has serious arm talent. On top of that, in his second year he gets thrown into a really bad situation and he only played better than the 3 year starter ahead of him.
If Grunk improves as most guys do between their first and second year as a starter, I doubt you'll need to worry about him playing for three more years at PSU, because he'll be drafted before that.
Also, any entitled kid has the right to say he's earned a job. Its just a matter of if the coach is going to tell him that he hasn't. I'll keep saying. If Campbell thinks someone else is a better fit. Go get him, but if he does. Grunks very likely to bolt, and he'll also very likely start wherever he bolts to. Most teams don't have elite 11 QBs on their rosters. Sometimes, I think PSU fans have forgotten we are one of the "have"s in this game. Most schools are the "have nots". Grunk is the kind of QB, that "have" schools get, and "have nots" wish they could have