Winning conference record probably would be considered a success.
Shooting for the moon, I don't think competing for the conference title and a playoff berth is too lofty of a goal or unattainable under the right circumstances. The ACC is somewhat open. There's no true power team standing in the way like Texas, Georgia, Alabama, LSU, etc in the SEC and Michigan and Ohio State in the B1G. Clemson is usually pretty good but they haven't been a true power since the DeShaun Watson years. Dabo hasn't really adjusted to the new landscape. Florida State has the resouces but they were a 2-10 disaster last year. Miami is losing their QB and is generally up and down. SMU will probably be good again. Louisiville seems like a team that is always ranked around 25-35 but never a real threat. After them you're in the soft underbelly with teams like Syracuse, BC, Virginia, Virginia Tech. Bill the coach will clean up some of the messy play from UNC this year (the defense was terrible). If Bill/Lombardi add enough talent I don't see how they couldn't hang in the race for a conference title, or title game appearance. Their schedule is pretty esay.
Home: TCU, Richmond, Clemson, Duke, Stanford, Virginia
Road: Charlotte, UCF, Cal, NC State, Syracuse, Wake Forest
Things can change quick in college.