I think @UNC could be really tricky, but the point still stands. We have 7 cupcake games: Marshall, Cal, Stanford, UNLV, BC, @Cuse, and vs. Navy are all ranked #59 or worse in ESPN FPI. Losing to any of those 7 would be "grave concern" level imo and going 0-5 against the 5 tricky/hard games would be "grave concern" as well.
Honestly 8-4 with non-blowout losses to OSU, Clemson, USC, and BYU with a win @UNC would not necessarily cause me to hit the panic button, though. 9-3 seems like the best bet.