The eternal question is: can he get better? Koskie did. Sano didn't. (But, then again, Sano is back at 3B with LAA.) As a backup, that flexibility is probably essential. To be an everyday player, he needs to hit RHP and LHP and play passable 3B. Long way to go.
EIther way, on Rocco's team, he'll get playing time and he'll play a variety of positions.