Thanks for this. I'd somehow missed it to begin with - much easier than using ionomy!
One more week for me to complete my powerdown on Steem.
My suggestion is to just maintain it (mostly "leave it alone") as it is for the few people who want to keep using Steem. (I think Steem will probably collapse on its own anyway.) I wouldn't recommend making it mandatory to set this as a beneficiary though... that's what I didn't like about esteem...
I also don't have anything against crossposting for those who want to do that.