It would be great to combine playlists together. With the option to avoid multiples of the same track(s) along with a prompt to confirm the addition of one playlist to another.
Updated on 2018-08-29
Thanks for sharing your feedback here in the Idea Exchange.
At the moment, we don't have any plans for this feature.
We're keeping the status as 'Not Right Now', but we appreciate all of the comments.
We'll continue checking back here, and passing this info on.
If there are any updates to share in the future, we'll keep you posted.