To me, that feels reasonable. Not guaranteed, since bad luck happens to us all. And I can't tell you now exactly what combination of free agent signings and draft picks and internal development gets us there. But it's reasonable to think that with time and the resources we have the OLine should get better.
Now, getting from average to great is often a lot harder. But that's for another time.
Talk about getting from average to great, let's take Detroit, who have had the best OLine in football for the last two seasons. How did they get there? Lots of high draft picks and big money for their guys hitting FA:
Decker - 1R (16th) in 2016, 3 years/32M G, 11M cap
Glasgow - 3R (95th) in 2016, 3 years/8M G, 3M cap
Rangow - 1R (20th) in 2018, 4 years/42M G, 13M cap
Jonah Johnson - 3R (75th) in 2021, rookie contract, 3M cap
^ replaced by Zeitler - 1R (27th), 3 years/16M G, 6M cap
Sewell - 1R (16th) in 2021, 4 years/112M G, 8M cap
So that's four first rounders playing on their line this year, heavy cash outlays ($41M in cap, $210M in guarantees over the next 3-4 years), and some really bad seasons to build up talent. They gave up Johnson in order to save enough money to sign Amon St. Brown, and got another 1st round vet to take his place. Compare with the Pats' ideal lineup coming in to this season (yes I know):
Chuks - 3R, 4M cap
Strange - 1R, 3M cap
Andrews - undrafted, 7M cap
Sow - 3R, 1M cap
Onwenu - 6R, 10M cap
That's 25M in cap space and a single first-round talent coming in to the season, and he's not playing. How come we couldn't sign a guy like Kevin Zeitler? Because he's a vet who wants to win, and knew he'd still make good late-career money and play alongside other top talents.