The only downside would be giving up our old traditional rivalries. There’s no way to keep USC, Stanford and Navy every year while committing to a 8-9 game conference schedule. USC would be the most logical one to keep. Might seem brutal having such potentially strong yearly out of conference opponent, but hey USC has been doing it for decades with us, so why not? Honestly, Stanford could be dropped and I don’t think anyone would care. Pretty sure Brian Kelly has gone on record that dropping Navy is a deal breaker. Maybe ND could get Navy in the ACC as a package deal, and that could be considered debt repaid? Or if we were in the same division we’d play every year anyway. You don’t want to stack your schedule against yourself, unlike back in the Holts era and earlier when a strong schedule was necessary to win the national championship.
One thing Clemson has benefiting it that’s almost unique, is that they aren’t handicapped each year with a strong rivalry game. South Carolina is their main rival and they are a very average program. It’s actually USCe greatest run in school history, three 11-2 seasons from 2011-2013 (all wins over Clemson), that may have actually delayed the rise of Clemson by a few years. Outside of that run, USCe has won 10 games a grand total of 1 time in school history.
This is not an issue at all in today’s playoff environment. Last year, Clemson made it to the finals and had 0 regular season wins against teams that finished ranked. They did best #12 Texas AM in week 2, but the aggies would finish I ranked at 8-5. Their conference championship game was against #22 Virginia would fall out of the polls after losing. The year before that the only teams that would finished rank were Syracuse and Texas am, they would cap their season against a 7-5 divisional champ Pitt and then go on to win the title. The ACC has proven that’s its suited to put out a Title contender for the entire past decade with FSU and then Clemson in the running every year. In fact, Clemson would stand to suffer the most from ND joint the conference by having a steady program to contend with annually.