There is a plan to put the real-time editor back on the XWiki roadmap for the second part of the year, but nothing is set in stone. It’s very unlikely that we’ll work on it in the next few months, so you’ll have to wait a bit. As for testing, that is always welcome and very much appreciated. Any progress on the real-time editor will be announced in the release notes so you should check that. You can also check the current roadmap.
Thanks,
Marius