I did, it is better, but also kinda sucks. In my understanding you have to rely on some big servers that keep the full history of all nullifiers forever so they can compute proofs on behalf of normal users. How much can that scale, if each person is making 3 transactions per day, and if each transaction will use more 2 nullifiers on average due to mixed inputs? That's over a petabyte per year just in storage.

Or maybe I misunderstood the requirements. Clarifications welcome.