An Athletic article on how the team has improved over the season said that at the start of the season the offence only occasionally got together to watch video, and now they're doing it almost daily. It sounds like they weren't particularly coached to understand what the OL was doing, and this is getting corrected.
I mean you can't overlook the fact that the OL got significantly remixed in the middle and consisted of a bunch of not all that dudes, and that they were always going to take time to get better, and no amount of understanding helps when they're just not good enough. Or when the play is so telegraphed that the running back is constantly getting man and ball three yards behind the line. Not that I think you are, just stating the obvious flip side. The extent to which the OL has gelled and which the playcalling has improved - same article says they made a big effort to change plays so it's less obvious whether it's a run or a pass just from set up - is a big part of it. But it does feel like the offence has improved and I'm guessing improved understanding is part of it.
And of course, to state the obvious again, Pickett being quick to escape the pocket was on his draft scouting report and that's just not going to disappear overnight.
Honestly I feel pretty happy with the way the offence has progressed throughout the season. Yeah, they're leaving a lot on the table, but I think they're showing more and more cohesion and creating more and more opportunities.