Many bug fixes/enhancements in this release, plus some new controls like a LinkSelect for editing data while clicking links, or a List control that generates ul/li type list easily (see OneUI list page). Also, look at the formTable, it now accept sections for editing data.
But beyond the code is the documentation. If you looked at the many xsp-config files, you've seen that they contain some documentation for each control and their properties. This means that the documentation sits there, waiting to be extracted. Guess what? This is done! Expand the XPages-Doc.zip file into its own directory and launch index.html. These HTML files had been automatically generated by a new Designer plugin I resurrected from the old LCD days :-) This is a first attempt. Much more information can be extracted and generated, as the registry is richer than that. It becomes a compromise between completeness and readability.
The HTML generator is basic and will benefit from a complete rewrite. I’m looking for volunteers here: if people are seriously interested in making it better, then I will release it as a new open source project, on openNTF of course :-)