I started gathering that data a while back before we began talking more often. It's way out of date now, but I was stuck and seeking some input from @ura-soul on the matter. I still think it's worthy of discussion and research.
My proposal, btw, is only one facet covered, but it's the only one we could feasibly do without fear of sybil solutions around it or other things. And that is to let votes stay, but if a witness is "red dead" (not active) for 90 days, that allows time for tech repairs, billing issue resolution or other reasons to be dead briefly, but at 3 months, votes should be reverted to their owners and removed from dead witnesses. Three months is enough time to say, yep, He's Dead Jim!
RE: A fundamental change to my witness voting behavior