I didn't propose it, I was an advocate for it -- we even did a panel with nostr:npub1tv8gmfhalwnxxquxjzeh6gtdsdz6vg7vx0s3rt7s7uuw6aujh32qn77wn2  at Nostrica for it.

The closer I got to it the more I realize it was a very problematic NIP.

I think NIP-46 is the right way of doing "delegation" as it's equivalent to taking complexity offchain