Rework API Reference
Rework API Reference page using different software to generate the website.
Since Wave is working with /// tags and probably even some XML tagging there are some other software packages to generate the API Documentation.
All the above improve the visuals a lot, which improve the user-friendliness. The current documentation is messy, unclear and sometimes its hard to find that one thing you need to find.
So changing the documentation generator is your best move to improve user-friendliness.