I don't think our offensive line was good before last year, for a number of reasons. Up until about a third of the way thru the season last year, I was very critical of them, for a few years. I always felt injury and coaching was the biggest factor in recent years. They'd hold it together for a few games, then back to the same old, same old. They'd look good for a half, then look the complete opposite for another half. Did campen learn how to coach? did the right blend of players happen? staying relatively injury free beyond an early center loss? I don't know. But most of last year they were obviously more consistent and playing at a much higher level than in any time in recent history with this team and staff. that said, I think they can get better in the run blocking department, but when your bread is buttered by a passing QB, i'm glad they're playing better.
As for Rodgers taking sacks by holding the ball too much, on occasion. He also bailed out a poorly functioning Oline with his ability to slide and move around. It's not a one way street here. prior to last year, even considering the sacks Rodgers took because of holding the ball, I think he made that oline look better than they were on a weekly basis.