I absolutely understand him requesting a trade, and don't fault him for that. Its pretty clear that both sides weren't happy with how things were going. That said, there's a right and a wrong way to handle that, and unfortunately he went with the wrong way.
In all honesty I don't think this makes too much of a difference in the grand scheme of things regarding where he'll end up or what we'll get back for him, other than essentially slamming the door on any hopes of him "figuring it out" in Hartford. He was going to have the "change of scenery" or "reclamation project" tag on him regardless, but he's still too young for his slow start here to raise too many red flags that a team won't take a chance on his potential.
I think there's a very good chance that he can make it on another team and have a very long, though unspectacular, NHL career. The irony is that these events might leave him with a pretty big chip on his shoulder that could help push him to the next level.