Alright. I just kinda wanted a well trained, super-lycanthrope type class for shapechangers, and bonus feats to go with it. I was thinking about a whole series of classes and feats, because I want to spice up the campiagn a bit, with factions of were-guilds, perhaps.
With any "claw sheath" idea, you could add two claw attacks, at say 1d4+dex, but its obviously only if you want to. The greater magic fang looks good, and, as you said, if it becomes a problem, you have a way out.
I really like it. Maybe you should make some weapon like "claw sheaths" or something, which adds gives better damage. It would be metal, and could be magical, sharp sheaths that would fit around the claws.