You know, I just remembered what they said in the commentary about how characters and weapons in the game were designed to be as distinctive as possible. Won't having a dozen visual variations of each weapon royally screw that up, no matter how selective Valve is about choosing them? There are already a grand total of 46 distinct weapons and items visible to other players (I left off the watches and PDAs but included the paper mask), with presumably three more on the way for the Engineer, with some already hard to distinguish from each other at a glance. Possibly more than any other FPS ever. Adding different looking versions of these same weapons will only make it worse, especially for new players.