Note that Sandro Boehme recently contributed his JCR editor to Sling,
at contrib/explorers/resourceeditor, so there's concrete hope of
getting a full-blown editor in Sling.
Yes, after adding tests I will work on making properties editable.
To just try out the current version of the Resource Editor you can add
the following OBR to your repository
http://www.jcrbrowser.org/sling/obr/repository.xml
and install the Apache Sling Resource Editor
(org.apache.sling.resource-editor) from the OSGi Repository in the Sling
Web Console.
You then find the Resource Editor at:
http://localhost:8080/reseditor/.html
Best,
Sandro