A New Look
The interface was rebuilt on one shared set of components. Buttons, inputs, modals, menus and avatars finally match each other instead of each being slightly its own thing.
Accent Colors
Five accents to pick from: pink, blue, green, purple and orange. Whatever you pick paints the highlights across the app.
Custom Emoji
Servers can upload their own emoji. Add them in server settings and they turn up in the picker for everyone in that server.
Server Settings
Server settings got a real home, with renaming, the server icon, emoji, and deleting the whole thing if it has run its course.