I don't think anyone thought that any of the teams in this year's 4-team field were going to claim the title of best playoff era team. TCU and Ohio State already had losses so they were out of consideration. And Michigan and Georgia were going to be facing off against those already-1-loss teams so didn't have the chance to knock out a couple of undefeateds in a row, to claim that title.
If Georgia wins, they'll have only beaten two already-defeated non-conference-champs along the way. That's not a resume that's going to earn you "best team in CFP era" points.