The new public build of the Roku app has this statement in the announcement/changelog
NEW:
- Support promoted playlists to home from PMS libraries and favoriting Playlist Libraries.
Where/How does this work? We have setup smart playlists of various shows that only include episodes that haven’t played in the last X number of days that we play via the shuffle button when we go to bed. Before the new UI, on the home screen we just had to navigate down a few clicks below the recently added items and continue watching and there was a section with all of the playlists, choose one, choose shuffle, done.
Now the only way to get to playlists is to go to the specific library that the show is in, navigate down, then left to the new menu, then down to playlists, then select the playlist and shuffle. It is far more complicated especially considering you only see the playlists that contain shows within the specific library that you are in, rather than all of your playlists.