Sadly, I'm thinking 2020 at the earliest, with a marginal improvement this year at most. Generally, it takes about three years to develop a lineman, and that position is still the weakest link . . . and it's the link that holds everything together.
If there's only "marginal" improvement this year then there's a really good chance that Pruitt isn't the guy. We need to see a 3 or 4 game improvement.