This was a fairly low-impact episode (especially compared to the ripsnorting season openers) but I have some thoughts anyway.
This was the first flashback that didn't seem to tell a complete story. It certainly had no resolution - what ultimately happened with the pot camp and the young narc? - and it also seemed that the climax didn't even play out in its entirety. We see Locke lowering his rifle as his betraying friend walks away, and that's all. Anything could have happened in the next few seconds.
I will give the producers the benefit of the doubt and assume it wasn't just bad editing, but it did seem unfulfilling.
And we're well into season 3 and we still have no idea what happens to Locke's legs. Out of pure impatience I'm starting to wonder if maybe he never was really paralyzed, and his inability to walk will be revealed as a psychosomatic self-punishment resulting from a nervous collapse or something. Such a revelation would go along with the island's mystique becoming less "magical" and more human-baroque as the show continues to grind on, anyway.
I do like the apparent explanation that Locke's present ideas of mysticism come from time he spent hanging out with hippies in the woods after his girlfriend dumped him. And we know that he still has further to fall before he hits the rock-bottom of the box company and a fake phone-girlfriend! Poor Locke.