What potential glory?
What Z did was continue to try to recover, play, and honor his enormous contract when his injury was severe enough that nobody would have blinked if he decided to just cash out - and I doubt insurance would have covered all the $$$ still owed him.
Anyway, there are three ways to look at this if Z goes to Miami:
1) Players in general don't take stands when it comes to other player's decision, because they realize some day they may need to "feed their family".
2) Z knows what went on in Cleveland, still respects LeBron, and doesn't condemn LeBron for his decision.
3) Z is a traitor too.
But for those of you leaning towards #3, I'd ask if Z's a traitor ... then who isn't?
If Delonte ends up joining Miami, though, all bets are off. That would signal something completely different.