I like where your head is at. I am not sure how hard that would be to implement or what all the downstream effects there would be.

One negative downstream effect I can think of is this creates a way for curators to curate other curators which could snowball out of control.

Side question - Is there currently a way for authors to reject the curation of a curator? I don't really see any cons in giving the author this power and it would allow people to "turn off" certain like spam "notifications".