Complications: FSU and Miami have Clemson to play (FSU at Clemson), plus their rivalry game. One or both will have a loss.
uga looks like they have a glide path to the Ole Miss game, followed by Tennessee in Knoxville. It could get interesting for them. With Bama already having a loss, they probably need to win out. Same with LSU.
I agree with you re the B1G. The kink in that look is the chance that tOSU/Mich/PSU give each other one close loss and two of them (or all three) make the playoffs.
Then there is USC. Or one of several PAC teams in what looks like their best year in a long while.
All that just complicates ND's route to the CFP if they do not win out convincingly.
ND and USC play each other, which will knock one out. uga will coast in. FSU has some tough games, but if they, or Miami for that matter, finish up undefeated they are in easily. Texas has OU and a history of choking to beat, but may well be the dark horse national champion we've been missing for a while. If USC wins out they can make a compelling case, but that would mean they beat ND so that makes this thought exercise moot. The biggest question is the B1G. They have three legit contenders, only one of which plays ND. If PSU or UM win out, they are in the playoffs. Which would mean a four team playoff of uga, B1G winner, FSU, and Texas.
There are a handful of other schools that could make a reasonable run if they win out, like Miami, Oregon, and Oklahoma, even possibly UNC, but for ND to make the playoffs, they almost certainly have to be undefeated and hope there are at least two conference champions with one loss.