I actually dislike Tomb, for the simple reason that trashing is often already a strong move, you don't need much extra incentive for it.
But now that I think about it, it is pretty funny with cards like Swindler, Thief/Brigand, Knights, etc.
Your Copper gets Swindled into a Curse, but you gain a free VP, hurray!
It does make Thief even worse.