Very useful to have this.

Even more useful if there could be quick and easy web console commands/options to clear the current list and add songs/albums to the list (i.e. single click options, rather than select to add to playlist, then select the right playlist etc)

Given the limitations you face with Alexa, this would be a useful addition. Although if the feature to add tracks dynamically to a "now playing" style playlist is done, I would potentially use that feature to achieve the same result (i.e. clear the current "now playing" playlist, add a song/album to...