The new UI looks great and steamlines the user experience, but could use a few improvements. The "New Playlist" Option, under Your Library > Music, clutters the user's list, and isn't in line with the current user experience for adding music to a list. If you scroll into "Artists", it uses a different design for adding as well.
I would recommend extracting it into the top right corner, making use of the empty space. This style could persist for the Artist and Album menus, making it easier and more consistent to add an object to their respective categories, without cluttering the list with a non-option.
I apologize for my mock-up being less than ideal, my illustrator subscription ran out. In essence, it would be the standard white plus button, aligned with the Music and Podcasts tabs. Or, shorten the search bar and place the "+" to the right of the search button.
Updated on 2020-03-11
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