Ecash is fine. But I preferred it to be in your own Wallet.

Zeus your specialty should still be self-custody, pro-privacy and security. Ecash being dependent on a federation to mint it and all the other things it implies is different from the model you guys run.

For those Cashu cases there are Enuts and other Wallets that are in their experimentation phase.

In the future they will be much more stable and used. Maybe then you can think about implementing an ecash wallet with all that it implies.