I believe the most encouraging part of Billy's 2012 season is his improved batting eye. Last year, Billy only walked 8.5% of the times he came to the plate; his career high walk rate was 8.9% in rookie ball in 2010.
In 2012, Billy has now walked 10.5% of the time.
He has also put the ball in play much more frequently in 2012 with his K rate at 16.7% this year, down from 21.8% last year, 17.7% in 2010 and 26.6% in 2009.
With his .388 BABIP in 2012 (which was the same in 2010), you really want Billy to put the ball in play so he can beat out those weak grounders.
Billy will be a fantasy baseball stud when he arrives, no doubt, but he should also be a valuable lead-off man if he can keep walking at a double digit pace and keep the K rate down.