This same thought occurred to me as a possibility earlier when Quinn proponents state that if Arch were the better choice, he'd have already made the switch. Quinn is the safer choice even if it doesn't pan out. Of course, none of us truly know Sark's mind on the matter, but I have no doubt that he will make the switch if push comes to shove, just as he did for that brief period against Georgia. There was nothing to lose and no one except a fool would criticize him in that case.
Quinn to me is like a Ferrari that is complicated and delicate to tune. Some loose wire or spring-loaded screw isn't just where it needs to be. It sputters along, occasionally catches throttle and takes off for a bit. But oh boy, if you can get it in the sweet spot, watch that baby go!
Here's to hoping Quinn gets his mojo back and settles into his groove. Because if he does, our offense really is unstoppable.