I'm sure someone will hit me up with the stats, but I wouldn't put all the blame on the OL for Rodgers taking hits, he definitely brought some of those on himself by hanging on to the ball too long. Hopefully, MLF, Rogers and the Packer offense can figure that nuance out.
All that said, the starting OL as is, I would rate a pretty solid unit. Taking into account the normal injuries that most of the 32 teams have during the season, you just have to hope that the timing is such, that your backups are ready and you don't find yourself 3-4 deep on the depth chart at one position or having to use backups in 2-3 starting spots in the same games. One thing that seems to have dropped off in recent years is good OL development. Not sure if that was TT finding the wrong guys or Campen not doing his job, or a combination of both. Let's hope that the guys (players and coaches) that Gute has brought in can do a better job.