This is probably something that would appeal to only a small subset of WK users. But for those of us who have lazily done their reviews over several years it would be amazing if I could sit down for an afternoon and do the burn reviews, unburning words/kanji that I’ve forgotten since I burned them 3 years earlier. I’m aware that I can go to the page and un-burn them myself but it’s time consuming and it’s going to take long enough to go through 7k burned items or whatever. It would be much easier if there was a button that appeared during the review that let me unburn it. Once I have become re-accustomed to it I could then burn it myself.
Anyway just an idea.