Funny, the other day I started writing an X server of my own. While I appreciate and welcome this work, I still use and write software that makes use of old X draw calls, which I intended to incorporate into my server, unlike the author of this work. So I'm glad to see my efforts have not been made largely redundant!
I'd at least consider moving older draw calls into an xlib replacement. Not all of them are suitable for that, but e.g. sufficient font handling to beat Xorgs server side handling requires the Render extension plus ca. 1500 lines of C for a basic TrueType renderer, or half that in a higher level language, or just use FreeType which is a dependency for most X clients anyway.
