Big OOC games indeed are relevant, no doubt, even "one step away". Let's say UGA beats ND and then loses to LSU in the CG, and LSU is 11-2, that win over a team that beat ND (if ND is in the mix) is a factor.
If Clemson is say 12-1 and ACC champ but lost at home to A&M who LSU beat, it could be a factor.