Would be nice if there was a scheme that worked for encryption/decryption over FROST, but even so I don't know if it would be useful in practice. I think it's better to use decoupled keys that just live on the devices, because performing dozens of decryption calls through a network of key share holders like that would be awful experience.

Better focus on crazy key setups that guarantee user identity keys for the long term instead, if you have crazy ideas.