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.
I would try to find a solution for instance agostic links for posts or comments. afaik there is currently no way to do that.
And to add to this the universal links with a ! should automatically be fetched by your instance instead of going 404 if they haven’t been searched before.