Hi,
the upcoming enigma2 update will bring a bunch of improvements for the Media Renderer Demoplugin. It does now work pretty well here.
The "track change nuisance" will also be fixed.
There will also be a new Demoplugin called "enigma2-plugin-demoplugins-upnpmediaserverdemo" which provides bouquets and providers via a (2nd) dlna server.