It has been asked for years and you seem to never pay attention to it.
Can you please give us an option to disable the cover art wallpaper in the lock screen?
The wallpapers look low quality and ugly. I also think they are not necessary, since we have the album cover in the notification already.
Plase, think about this feature. You'd make your users very happy.
If a lot of music players can have this option, I don't see why you can't.