What about allowing subkeys in nip-05?

then you say subkey user@host is that same as masterkey user@host

{

"names": {

"_": "de7ecd1e2976a6adb2ffa5f4db81a7d812c8bb6698aa00dcf1e76adb55efd645"

},

"subkeys": {

"_": ["63788a374051653757367fd221bbf9c1b5c68bacc60ac45daa0b5877c6baf49c"]

}

}