I was wondering if this was the case, especially in the lower minors. I figured once you hit AA/AAA the technology and attention to detail might be better. In A-Ball you expect raw players. The stats while important have to be made to mesh with the eyes. Now once a player hits AA, the line blurs, and by AAA it's all but erased. By then, the eyes and the stats should say the same thing.
I don't think this is a hard fast rule, more of a guide. It's why I'd give younger players the benefit of the doubt, and question older players (college guys in the low minors) ability and ceiling. In short, I think Mes can improve, probably more than Coddington can. It's also why i never liked a certain CF's offensive game.