Name suggestion: Snarks.

But there are more than 3 things wrong with Zcash:

4. Transparent transactions are allowed, enabled by default and even possible if the receiver wants to remain private.

5. The creation of a transaction is slow and resource-heavy.

With regard to point 5, CredaCash claims to use a much more efficient hash, but that's hardly a real blockchain. It uses 'permissioned witnesses' instead of miners and will premine everything. Source: http://credacash.com/compare/