I think they have actually lost lots of altcoin rather than bitcoin so they havent enabled most of the alts yet. May be they are upgrading security of their altcoin wallets. Or they may be just buying alts and including them slowly step by stem. I know they can return back even after this hack which is realky nice of them.
they say customer money is not stolen. In considering their feature and function, it should be, and understandable.
I will be using Shapeshift again.