I hope it isn't too late to make another feature suggestion:

What about enabling users to suggest edits to other users' posts and comments? It is my favorite feature on Quora, and I wish the same thing was possible everywhere on the internet.

It is awesome for all those times when people make minor spelling or formatting errors and I don't want to make a big deal about it by writing a comment. Whether or not the suggestion should be accepted or rejected is of course always the original author's decision.