For me, Spotify would improve a lot if playlists would get a album or artist view, in which all the songs in the playlist get groupedby album or artist respectively. Just like iTunes does it. Spotify seems to be very song based rather than album based (which might reflect the modern way of thinking about music) but I still have plenty of playlists that rather are album based, e.g., a list of my favorite new albums at the moments. It would be great if there was a view option where songs would be clustered per album so that I, or one of the people who I share the playlist with, could listen to one album out of this playlist.
Alternatively, a different approach to playlists could also work for me, where you have one type of collection (let's keep calling these 'playlists') that contains single songs, and another type of collection (with a different name, e.g., 'crates') that are use to organise and share a collection of albums.