That's too bad. Sazh was actually one of the better characters. Not only was his subplot one of the few that had at least some emotional resonance, he was also one of the few characters that got to evolve beyond his initial archetype ("Black comic relief sidekick!"). The big problem was the he had to be thrown in with the rest of the losers.
Actually, Snow isn't that bad either (although his "love" for Serah didn't seem all that convincing to me. And since that seemed to be a HUGE part of Snow's motivation for action, it didn't really help his character plotline.)