If it didn’t matter in the 4 team why would it in the 12?If the CFP Committee members are lemmings like you appear to be relative to talking head opinions from ESPN and their favored conference, then maybe the 8 game conference slate won't matter. But there is no question that 8 game slate will have a negative impact on an SEC team's SOS and power rating if the 4th non con game is a G5 or FCS opponent. And SOS and power ratings will be and should be more relevant with CFP expansion and at large team selection.
I can admit almost every SEC schedule is harder than every other conference. I still think they should have to play 9 but I don’t think anyone will be able to say they play weak schedules anymore.