Imagine 2 scenarios, if you would. Which is better for player development...
Scenario A: LoA hitting coach is head-and-shoulders better than the hitting coaches of the other teams at that level. Let's say the coach is a 79, where next best is 75 and avg hitting coach is 65.
Scenario B: HiA hitting coach is 81, which is just average among the HiA hitting coaches in the league, but he's 2 points better than your LoA hitting coach.
Would your prospect develop better with the middling HiA hitting coach (Scenario B), who is 2 points better than your LoA? Or would your prospect develop better with the rock star LoA coach (Scenario A)?
(forgetting all the other variables for now)