This turned out to be pretty awesome. I still think the original face was better cuz it just looked meaner. It also had the flatter look Clay's head usually had in the show. The new one is pretty good too,though. The expression on the new one is much better.
Maybe give the ax another whirl as a solid piece of sculpey? Something just doesn't look right with the block. Maybe if the arm was coming straight out at you? Maybe you could do a couple different weapon hands. If you were to cast this I think interchangeable hands would be a pretty cool feature of the kit.
Enough of my nit-pickin. It's awesome. Sell it to Sideshow and make gajillions.

Your next Clayface should have Bats clawing his way out of Clayface's torso, head and arms poking out of his gut. That was one of the best Clayface eps of Batman:TAS.