Why would one think that? Successfully drafting a franchise QB doesn't automatically get you a great OL. This is a weird assumption you make.
They've added and developed so many different offensive pieces. Go watch the 2018 season vs the 2022 season. It's crazy how much has changed on offense.
Adding Saffold, Crowder, Howard, Cook, Shakir, plus the other OL depth, is not just "running it back." But besides that, the offense has been so good, I'm not even sure why "running it back" would be a bad thing... I'm more concerned about the defense. Aren't you?