I fall in love with potential outliers, that is, players who have a story that explains why they're older, or went unnoticed in the draft or in LA.
I'd note you kept harping that Hoskins was overage, now he's merely one of the top young hitters in ML.
Key was his tremendous consistency at each minor league level, and the fact that his BB rate increased as he rose, which was very rare.
So I'm watching Hall closely, because while he's a longshot, the power is indisputable, the question becomes whether he has the vision and discipline to lay off bad pitches as he rises up the minors, because that's the downfall of most minor league power hitters - pitchers discover your "kryptonite" and keep feeding it to you.
We'll see what Rosso has, like Waguespack, they may be able to up his velocity by 2-3 MPH through tweaking his mechanics, and if he can average over 92, that's all you need (see Arrieta, Nola). Then it comes down to secondary pitches and command.