Hi Mish. Long time reader. First time I have commented. I like your prior site better on look and feel and readability. JMHO.
Any user can edit their comment. Hover over the text, then choose the (...) to the right.
The worse part is that you can't edit your comment, either, despite what some superusers claim. But you can LIKE your comment, or SMILE about it. :)
I feel the same way.