Kay Adams: Did Saints QB Derek Carr Figure it out at the End of Last Season?

It's definitely this. The guy was on back a lot the first half of the season suffering injuries because of it. Once Penning got replaced there was a difference in line play.

The only issue I see for this season is that it's a new offense. Hopefully it doesn't take long to find our groove.
Actually, Penning going out really didn't change much because when you go back through the games, you would see more pressure coming from the right side. The O-line really changed after the blowup between McCoy and Carr. I believe they simplified protections, as you saw Carr doing less at the line after that.