I agree most of your points there, except the Big Ben comparison. We will just agree to disagree on that one haha.
But no, I can't say I blame Mcd for trying something different as TT was ineffective. But at the same time, it kind of was a head scratcher how he thought Peterman would be ready for a tough LA defence on the road.
It ended up being the wrong decision, but Bills weren't going to beat the Chargers with TT anyways.
In regards to Peterman, the odds are for sure stacked against him as he is a 5th round pick with a limited skill set, but you never know I guess.