Thanks for the new Desktop client upgrade! Apologies if this idea has already been submitted—I searched and didn't see it.
I have many large playlists mostly containing multiple complete albums that I add albums to by visiting an album page and dragging the album cover to the playlist to add all of the tracks from that album to the playlist.
I then use the Date Added column to sort the playlist by Date Added ^ (Ascending). With the previous version of the desktop client, the effect of this was that the most recently added tracks were at the top of the playlist, but the tracks were listed in the correct album order. Super convenient for not having to scroll to the very bottom of a long playlist to get to my most recently added albums. Also to be able to listen to albums (in the correct track order), from most recently added album to least recent.
However with the new client, the tracks display in reverse album order. I assume this is because when I drag and drop the album to the playlist, the tracks are technically added in album order, which then means sorting the playlist with most recently added at the top would flip the order of the album.
It would be fantastic if the original sorting behavior could be restored (perhaps by ignoring microsecond differences in date/time added).