Polls after the bowls include simple truth - if you win, you rise. If you lose, you don't, and you almost always fall. With the 2 additional wins, Ohio State and us would probably have been 6-7 in week 15.
I don't think we were going to get above #7 as things turned out, and probably wouldn't have been in the playoff even at 12-1. We were at #8 before AC, and a win there plus one over Utah doesn't buy us that much. If we were the 7, and if we beat #6 tOSU, we go ahead of them. #3 Notre Dame lost badly, and can't stay at #3. #4 Oklahoma, #5 Georgia, #6 tOSU, #8 Michigan, and #9 UCF all lost, so none of them could rise to #3.
The only choices for #3 would be to elevate #7 WSU (13-1 and the only team #3-9 who won their bowl) or to vault Florida up 7 spots or LSU up 8 spots, and let one of them be #3 with 3 losses. We know that wouldn't happen, since LSU and Florida topped out at 6 & 7 in reality.
Of course this is purely speculative and hypothetical, but I have no doubt that if we'd won AC, the Pac-12, and the RB...we would have finished at #3. The math just can't work any other way.
12-2, even with the RB loss, puts this team in a top 2 all time battle with the '97 team. 13-1 with a #3 finish and an RB win ends the conversation. Even at 11-2, I saw an article somewhere that put this team at #5 all time.