Just done the new 4.1.1 update with the new Alexa support.

However if I try and play some music via a voice command it says Spotify is not supported on this device? 

Dont use amazon music and want to control Spotify.

found the google assistant pretty useless at controlling Spotify also as it would offer open Spotify but not play anything.

any advice anyone as this is really dissapointing and would be awesome if it worked.