I think it's sad. All his career, he has been rocked by critics who have said he is soft, lacks the desire and heart to be a star, etc.
I don't think you can really question his motivation anymore, though. He went through an entire Pat Riley training camp with his status up in the air, getting paid $109 a day for food and traveling expenses - granted, $109 seems like a lot of eating and traveling - but I'm not sure I'd go through two-a-days led by one of the most infamous coaches renowned for his exhausting practices, on two arthritic knees, one of which has been cut open in surgery five times... all for $109 a day.
And to boot, I watched some Heat games this season, and he was unquestionably the best player on the Heat at getting Shaq the ball for an easy layup, and he looked for Shaq downlow virtually everytime he touched the ball. So, to pile it all on, he completely swallows his pride and decides he is going to try to make Shaq - the guy who has sent snipes at Penny pretty consistently since leaving Orlando - a better, more satisfied player. Then, he gets waived for some no-name from the D-League.