Now you can see not only the avatars, but the names of all the people who liked or otherwise reacted to your posts!
The “FAQ” has been re-labelled as “Guidelines” in the menus since that’s what it really is. However, it isn’t changed on the menu bar right now.
The :emoji: picker has been updated and should be locale-aware. 
All the changes are on the new, and now far more readable, releases site: