This is kind of a weird take. Or at least a little blind to the events. Hartman started as a true frosh in part because Newman was unavailable and/or limited through the first 4 or 5 weeks of the season. By that point, Hartman was playing awesome against inferior competition, but struggling against really good competition and really big and fast defenses. But he had (has) a real swagger and a confidence that are almost essential in a QB.
Newman, on the other hand, had been in the program for 2+ years and had not particularly distinguished himself other than being a really good teammate. He did not really have that swagger. There is a 10 minute video on Newman's highlights on youtube posted by ACC Digest I think, and honestly, he didn't even swagger until after huge touchdowns. It was only the bowl game in my mind, where he started the game with a swagger. I don't know whether it's because he's a more humble guy, but I think it certainly helps a guy his size to have that swagger. You can almost ignore the linebackers on the rush because they are essentially his size. I remember watching Cam of course, but also Vince Young their senior years and they really didn't care about the rush from almost anyone because they had size and strength on everybody but the interior DLs. Huge advantage.
Anyway, I don't think it is all that fair to Hartman to compare his 9 games to Newman's 4. Hartman should be fine. I hope he gets to redshirt this year but not the end of the world if he can't or doesn't.
I do think the NFL is moving to a backup QB system in that they want QB2 to come in - at least on some teams - as a change of pace QB rather than a veteran stiff whose only real wow throw is the deep corner out. Newman has the potential to be that type of guy who can run a keeper perhaps even in the NFL, but also throw all the short passes. Again, I don't see him as a starter, but as a career backup, but he could come out next year with a greater liklihood to get drafted in the 4th or 5th round than Dortch had. We may need Hartman to be THE guy again next year. If all goes really well this year offensively and Newman stays healthy.