Willie has nothing left to prove at the Minor League level. The last time he was at charlotte he was batting nearly .400..
As for the slugging %, his job isn't too hit HR's, it's to get on base and once on cause havoc on the basepaths. Complain about his OBP, or his lack of steals if you want to compain abuot anything.
I agree w/ WHarris, it's a confidence issue... A guy w/ his speed should have more stolen bases than Arron Rowand... Last time I check ARod had twice as many SB's as does willie.
One thing I have noticed about Willies lack of power, is that when a ball gets to the outfield on the fly it's either to the RF, or LF.... He's Pulling it, or slapping at it. He needs to just drive the ball back up the middle, and then the SLG % will come up... I can't remember WH hitting a gapper at all this season.