Guys when you get past your vested interests which clouds your vision, then you'll eventually realize as I had already explained in excruciating detail, that Zcash is the only technology that can realistically give us (and more importantly corporations) privacy on public block chains due to the insoluble meta-data and overlapping rings anonymity unmasking issue for Cryptonote/RingCT (and any other mixing solution for anonymity such as CoinJoin/Dash, CoinShuffle, etc.).

The zerocoin mixer can be periodically reset, forcing all anonymous zerocoins to cash out periodically to basecoins which can be re-minted into the next instance of the zerocoin mixer. In this way, it can be proven that no zerocoins were created out-of-thin-air. All the anonymous mixing that occurs in the zerocoins can remain fully masked because the zerocoins balance can be merged before un-minting back to a basecoin.

So the problem is easily resolved. And the anonymity is not compromised even if the master private key was.

Corporations are going to generate their own masterkey in a consortium ceremony, so they will be in control of their destiny on this. Again I urge Zcash to focus on the corporate market.