I would really like to see private messages, image upload and text formatting done.
These are the functions that I really miss and I think every forums software should have them.
I understand that Flarum tries to be modular, but this really is a basic functionality which should be there as a core function. At least the private messages.
Sure, we have file upload extension, but it has terrible validation and no file management when posts get deleted/edited. Even worse: there is no information for the user about the file upload status.
Text formatting is also there as an extension, but it isn't really the best looking one.
Private messages are totally missing.
Flarum is really nice piece of software and I like it, but it looks like the development is extremely slow. Maybe I will learn Mithril ( oh, I hate JS so much ), get familiar with your code ( from what I've seen so far, it feels really good for a PHP code! ) and try to contribute
Anyway, thanks for your awesome work guys, keep it up!