I don’t know if this is right place, however- I have a reccomendation!
As you know there are a lot of projects that looks bad at beginning, but rises and gets impressive or which looks promising at beggining, but at the end gets at zero. Especially it happens at game engine. However, sometimes people vote bad vote, but after that see, so it is changed and now looks good, but they can’t upvote. And also happens opposite. It would be nice if people could change their votes on threads!
I like that idea as well,