I want my master key offline, and per-device signing keys online. That isn't centralization.

And I cannot do that with NIP-46 where the bunker has to be online.

The only solutions to provide this that I can conceive of are major breaking changes.

My keypair has leaked all over the place and it is only by the grace of god that people haven't noticed and posted as me.  But as of today there is almost zilch I can do about it.