I've done a fair amount of rejecting of edit suggestions over at Gaming lately, and I've noticed (presumably due to our recent surge of new users), a sharp uptick in invalid edits that should really be comments, or even answers.
In one case, the only answer a question has gotten, has come in the form of an invalid edit.
While I'm stuck rejecting these edits at the moment, I would love, particularly in the case of anonymous ones that make real contributions (and I've seen a few others), to have some means of flagging them for a mod to convert them to a comment or answer. It just doesn't feel right to have my best course of action being to copy an anonymous users contribution and post it myself, to claim whatever rep or kudos might accrue from such action.
To make it clear what I'm suggesting, here are a few examples from just the past month or so on Gaming.SE. Most of these are constructive and useful comments, but generally make for poor edits.
https://gaming.stackexchange.com/suggested-edits/4434
https://gaming.stackexchange.com/suggested-edits/4128
https://gaming.stackexchange.com/suggested-edits/4252
https://gaming.stackexchange.com/suggested-edits/4840
And some attempts to answer the question via an edit:
https://gaming.stackexchange.com/suggested-edits/4334
https://gaming.stackexchange.com/suggested-edits/4508
https://gaming.stackexchange.com/suggested-edits/4238
https://gaming.stackexchange.com/suggested-edits/3908