The parameter generation, in a non-interactive zero knowledge system is always going to be an issue, unless its created through a consensus..
Interactive would mean you'd need the other party to be online to redeem your input, so we're working on a way of sending your funds into infinity, where they will be redeemed from infinity.
At a base level there's always going to be some sort of mixing involved, whether its destroying/minting, or whether its using some sort of tokens, etc..