Yeah, sure. Jeter, Cano, Damon, and Abreu (NY numbers) career-like years are the measuring stick. Those career averages don't play a factor.
The Drops you Forgot:
Damon's BA/SLG
What Shouldn't get better:
Jeter's OBP
Cano's OBP
Things that will get better, but more marginally that you think with age/trend:
Giambi's OBP/SLG
Abreu's SLG
Things I don't think can be predicted very well:
1B
EDIT: And, the rough count doesn't hit on the crux of my post. Magnitude counts. The dropoff from the regressions will be much larger than the gains in improvements.