Allow drafting of threads so you can add to, edit and publish later.
Allow for logging in with EITHER email or username.
Make adding emojis to a thread a lot faster as it takes up to 5 seconds (sometimes) for the menu to load, and allow me to press ESC to leave the emoji menu.
Add BBCode to the text editor, thought HTML allows more functionality than BBCode generally does, something like huggle is only compatible with BBCode and I'm assuming a lot of other text applications only support BBCode too.
Maybe allow for Smarty templating and PHP templating like it was in v1.