Mentally he just wasn't all there this season. He wasn't in his usual role at the start of the season and had some trouble adjusting. He had some great games for the Magic but he just seemed too passive and distracted at times. As for his play with the Knicks... can't blame him on that one.
I like Stevie. I think he's a real talented guy that could flourish again in the right situation. Speaking as a Magic fan, I wish him all the best.