As to the alternate cover suggestion previously posted, I would like to see an integration of the existing features as follows:
Selecting a custom image as a default background is great. But as the music changes, applicable covers should be allowed to override the custom background. As of the current version, it is either one or the other. Cover images as backgrounds are a wonderful feature, but then in the absence of a cover, you get a bare background when you should be able to get your selected custom image instead. If you select a custom image, you can't have covers as backgrounds when they are available.
IOW, the album cover background and custom image should work as an if...then...else not an either/or, with the album cover being able to become the background when available, and when not, your custom image displays as the default.
Would make it much more pleasant to look at, IMHO.
Thanks for listening!