Create/merge playlists

I love to make playlists, however they tend to take ages on iPhones, I don't have easy access to a desktop! I would like to see any improvements such as the ability to add more than one song at a time! Which led me to the ability to merge playlists! For example I would like to make a UK Urban playlist which would involve merging 3/4 of my current playlists already made, as it would take me many hours to be able to do this manually!
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Status changed to: Duplicate