1
I don't think you can really say that Alvarez is last year's Ackley. Alvarez is a slugger with a 2 EYE, Ackley is an all around plus plus hitter with a 1 EYE. Alvarez is a mediocre fielding third baseman with a future in LF or 1B. Ackley is an average defensive CFer with a future in the outfield or at 1B if his health becomes a problem.
Orgs take their time more wiht guys who aren't as intelligent at the plate, even with huge upside power potential. ESPECIALLY Pittsburgh - known for dragging its heals getting prospects to the big club and ruining them in the process.