Good businessman, terrible sports owner.
He got the Oilers a slam dunk arena deal but until he hires a decent GM, it's all for naught.
If we had a hockey GM as smart on making hockey deals as Katz is at business (completely took city council to school and leveraged them perfectly to get a hell of an arena deal for the Oilers) we would be a Cup contender.
If we had a GM who was as ruthless and smart at making hockey deals, we'd be in very good shape.