I like very much the recently-added ability to convert an answer to a comment. However, the dialog requires the actual ID of the post that will be the parent. It auto-fills the question ID, but for an answer, I have to go hover over the "link" button and memorize the ID (or else copy the whole link and delete everything but the ID).
Here's a screenshot so you don't have to read that terribly long paragraph to see what I mean:
The list should ideally show a) the author, b) the first bit of the answer, and c) as a tiebreaker (if necessary) the answer ID.