Grab this in the Store if you're a Fast ring Insider. The new version of Groove Music for Windows 10 (Mobile) is v10.16092.1022.0, with changelog best shown off visually here:
Artist art is now given a colour boost and a slight opaque screen keyed to the dominant colour in the main image. The effect isn't necessarily shown off that well by the example above, but it can work well. Mind you, it would be nice if this was a setting....
Ignore the font changes in these screens, by the way, they're from a Lumia 950 (left) and 950 XL (right). Note the change of the playback control bar from fixed Microsoft blue to a shade that matches the art's dominant colour (again). This aspect works well. Ditto the art background. It's slightly more... immersive.
Also new is that there's an interstitial pair of links for the Feedback section, deep linking and directing you accordingly; (right) the new version number system: made up from 10. (20)16 (i.e. year) 09 (month) 2 (half of month), followed by a build number (I'm guessing).
PS. If, for any reason, Groove Music is broken for you, it's worth bookmarking WC's handy guide to resetting the system completely.