I think a better idea than “new clbumes” would be to have a quest that unlocks one of three “prestige clbumes” for each clbum (depending on alignment) which consists of nothing more than a new name for the clbum, a unique new skill tree, and one new unique upgrade pack. Good trolls could get pedantry attacks, evil hackers could become black hats, etc.

That would be more fun for current players and easier to balance, and add much needed variety. Plus, it would make alignment do something.