Is there a quick way to change the track order in my playlists?
Yes there is.
To change the track order of a playlist in the shortlist, click 'Change track order' from the Actions menu:
For existing playlists in the Explorer, choose 'Change track order' from the playlist hamburger menu:
In the Change track order pop up, choose from the following sort options:
• Artist a-z
• Track a-z
• Date added (oldest to newest)
• Date added (newest to oldest)
• Year (oldest to newest)
• Year (newest to oldest)
• Track order (ascending)
'Custom' is the existing order. 'Track order (ascending)' orders tracks by their track order metadata.