Checking back to see if you've made any progress ? I've started investigating the ability to add Mezzmo context menu items to things displayed from the Kodi database and played natively through the Kodi main screen. As you've seen you can play Mezzmo movies and episodes from the native Kodi screen but a number of the Mezzmo extras aren't available via that method and sync needs to be enabled to populate the Kodi DB.
If I am able to add the context menu items to the main screen items then you'll have close to feature parity with the addon. Some things which would still be missing would be the performance stats, slideshow viewer and non-uPNP server support. As well specific Mezzmo playlists and folders would need to be added as shortcuts in the Kodi menus in order to browse them.
I'll post updates as I make progress. This will likely take some time.
Jeff
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