The problem with the current wiki is that it's hard to edit. And before someone says it's not, try a simpler wiki based on GIT, for example. Plain text files, distributed, locally available and easy to update and check the history using simpler tools. I'm sure many will agree with me, other might not.
But the point is the user experience of the wiki. The GUI is awkward, and hard to search, compared to the other sites I've listed (try them out).
And of course, I'd like to know how the API is generated. Ideally it should come from the Haxe source itself, and an export tool should be used to transform it to a web GUI that provides a nice UX.
Lastly, the current "Documentation" section is a simple, confusing list. Can't seem to make sense of the structure. I can't even find "Macros" in there (I wanted to read about it). Its structure should be rethought.
Please see this a constructive criticism, and I'm willing to help, as I currently mainly do web development.