I love the sleep timer and the auto-off after x minutes of the sonos alarm. However, in both cases it is extremely annoying that the music always abruptly stops after the specified time (especially for the sleep timer since this always wakes me up again).
It would be super cool to have the option (when setting the sleep timer or alarm) to "play until end of song", meaning that after x minutes, the currently playing song will play to its and and only THEN will the music stop. This would be a much more gently way to end the music. Alternatively you could also specify a certain number of songs. I guess a slow fade-out would also do the job, but I like the first option better.