Was suggested back in 2012 and appears to have either disappeared as a feature or is not even important anymore. I want to see a sound meter like the one in Windows Media Player which serves also as a visualizer. Granted, it may be harder to implement EQ to the program, but it would be awesome if they did as well.
Spotify is boring, honestly. No things to play around with.
this feature has already been implemented. Just typespotify:app:visualizer in the search bar, select your prefered visual and enjoy!