User flairs!
More of an app than a platform feature, but the ability to collapse all child comments.
On Jerboa at least you can do this by tapping on the comment
True, but I mean for all comments in the thread at once.
If you tap the top comment, it also hides all of the replies under it. Am I misunderstanding what you mean by thread?
easy subscribe links - like, click on it and then subscribe, not the current method (which totally functions but its cumbersome and unwieldly).
Ability to hide posts
More for jerboa, but RIF had an option to confirm you want to go back/refresh feed. My palm accidentally hits the back button often, and I have to start scrolling back from the top.
Ways to group communities to browse at once rather than just local, all, and subscribed. A multi-Lemmy if you will.
Hopefully a multi-community (multi Reddit type) feature
User and post flares!
Turn off auto refresh feed.
Better ways to explore the communities available. Also maybe improving the Android app ecosystem.
You might like https://lemmyverse.net/