Bummer for him, but not exactly surprising after he narrowly avoided getting fired last month. NBA coaches are basically hired to be fired. It's rare for a coach to last more than five seasons anywhere, even the good ones. Right now I think there are only about a half dozen guys who have been with the same team for five or more seasons.
He'll land somewhere else. I think he did a good job in Phoenix, but poor roster management and injuries to key players eventually caught up with him. Didn't help when Morris went in the tank after they traded away his brother.