I have done zero bedtime reading about zero cash so forgive me if I'm writing crap, but anyway my impressions I have that I don't like are that it is owned by a company. In a sense it is centralised with a generous slice of minted coins directed to the aforementioned company.

Also I remember hearing about an anonymisation technique in which you have to trust the person who generated the first block to destroy the private key without writing it down, otherwise they have the ability to decrypt the anonymisation forever after. Is this using that technique ? If so why trust they don't have the backdoor key handy ?