Holcomb is a great guy to have as a backup, and that's about it. When he steps in the game after the starter goes down, he does superb against defenses who schemed against another QB.
But after that, there isn't much to Holcomb as a full-time QB. He forces too many passes, and gets injured way too often... He's just not starting caliber, but he's better than having Craig Krenzel or Chad Hutchinson to back you up. That's for sure. Take it from a Cleveland guy!