I'm in favor of modifying the documentation, not the option labels. The choices are relatively clear: keep means do nothing, nada means don't vote, reap means reap, and edit means do some sort of janitoring short of reaping. I don't think adding "no" and "yes" will, on average, make things more clear. If someone can come up with a 4-letter word that encompasses all kinds of janitoring short of reaping, I'd be in favor of replacing "edit".

A three-letter word that I think would work is "fix". I'd also go for "salvage".