Re-designing the white Spotify app was a very popular idea. Also as you can see in the monthly ideas reviews, Spotify keeps adding new features that are highly demanded by the community. Spotify IS listening but can't build those many ideas at once, sometimes they just don't work with the current agenda.
Your ideas that you mentioned can be found via search - please post your comments there!
Also repeat track got implemented on the desktop client already and should hopefully roll out soon to the other platforms. 😉