Heyo, what little things with Reddit and RES have you been missing with the Lemmy UI?
For me it’s been keyboard post/comment navigation (like RES) and keyboard shortcuts. E.g. I can’t post this submission with ctrl + enter as I could on many other input forms.
A way to jump to the next comment within a level. Infinity had a big button to jump to the next top level comment, and the reddit web page you can click on the colored bar that aligns the comment levels to jump to the next comment.