Implementing my proposal, technically, boils down to "a simple matter of programming" (and of course witness consensus, in case of a hard fork). But that's in essence a bridge too far, for now.

I'm mostly interested right now in learning about any unwanted possible consequences I haven't thought about (are there any?), and of course learning about if and how people will use it.

Would you?
Personally, for me, if this were made available, vesting more SP would certainly be far more interesting!