Reading the letter, it strikes me that LeBlanc still does not quite realize that he did not have it, that he was just not good enough to be a NHL player. He played in the NHL at 20, and he probably thought that he deserved to be there like many heralded young prospects. However, the organization rightly saw that this was not the case, and they decided to treat him like any other prospect in the organzization and let him earn a future call-up. It must have felt unjust for LeBlanc because all his hockey life he was the chosen one, but it was the right thing to do because he just was not as good as he thought he was. Lefebvre was probably tough but fair with him, and LeBlanc folded under the new reality.
I think LeBlanc busting is not that surprising. As an athlete, he looked very underwhelming. He was not really fast, nor strong. I don't remember him tearing the QMJHL at 19. I think he was probably a player that peaked early (Midget level) because of his smarts on the ice, but when the competition got more intense, his athleticism (or lack of) resulted in his demise. Also, I don't thing he was willing to "fight" for it. Average players like him only make it out of the large pool if they give it everything, and LeBlanc was not that guy.
He was just a bad pick. I think Timmins was on the fence with him and Kreider, and picked the wrong one. It happens to all scouts. I agree with Louis that it's time for people to move on.