This is a hard one.
One, it is extremely likely that Kern would not be the meaningful improvement we are hoping for. Clawson wants to win more than he wants to play Griffis. I think, based on Clawson's comments so far, he's been trying to save this season as opposed to writing it off and trying to either pull a rabbit from the hat (much better Kern, despite prior data) or plan for the future (which we can't really do with Kern because of his class/age). This makes sense to me, and I agree that our best chance to turn this around is with Griffin. Not that I think it's likely; just less unlikely than tossing Kern out there and hoping.
Two, having said that, we need to see substantial improvement to have any sense of comfort with Griffis. At Clemson is not a great game to break in a new QB, but we have a bye week.
On the whole: yes, Griffis has been almost indescribably bad. But also, yes, I think our best chance at salvaging this season is to hope Griffis can play better. Not a great position, but it's where I think we are.
One or two (because, Clemson) more awful games, and I think Clawson will make a change. Likely not with Kern, but with someone other than Griffis.