Not necessarily a button, just came to mind first.
Noticed a moment ago after blocking a community I’m not interested in seeing, there was no quick and easy way to get to the top menu to refresh the feed. A button or pull down method to quickly return to the top of a feed, or just show the top bar quickly would be nice!
I am glad that my difficulty in getting registered on lemmy instances led to trying out kbin early. It really does feel a lot more polished currently, and I still get all the lemmy content.