I don't undertand the reason for your tone????
He does have a plus curve-that describes it's action, not his ability to locate it.
I'm not sure I agree with the assessment that his change-up is "rapidly improving".
Is he getting better? I think he is. Does he have more work to do? By all accounts, he does. Try to find a loud voice in the organisation (or from scouts outside it) that are wondering why Homer hasn't been called up yet.