In real pro baseball, there is more volatility in player careers than in HBD. More players' seasons end prematurely; more players have positive breakthroughs, early, or in the middle, or even toward the ends of their careers; etc.
You might want to look into the big picture and see if you'd like to do anything about that.
(Then again, you might not, of course.)
PS: Always interested in a more realistic, escalated improvement from Post Traumatic Demotion Disorder, or from sitting out a season, or some not nearly all injuries, etc.
PS2: Very interested in being rid of the artificial skew toward hitting in SLB, woops, wrong venue. ;-> (I'd like to play that more, but it annoys me.)