First of all I want to let you know that I am very happy with the Spotify app for the Samsung Gear S3. So far I only have the little following concern:
When I quickly select a playlist and then hit the "Shuffle Play" button, which I usually do for workout, only the first 20 songs of that playlist are being played. To have all songs being played, I first have to scroll down the playlist until all songs in the list are visible. This is not very much of a hazard, but it would be nice, if "Shuffle Play" would take the whole playlist into consideration, not just the visible entries.