Add a "Shuffle Play" Button (exactly like mobile) to playlists on desktop. Currently there is no way to shuffle without turning on app-wide shufle, and the problems with that is this: it doesn't decide your first song. When I want to shuffle my playlist I don't want to have to choose what song to start with. Mobile has it done perfectly, a large button at the top of the playlist. On desktop this just does not exist and it should be pretty simple to implement considering the technology already exists.
It's also pretty stupid that such a big player in the music industry doesn't have a simple shuffle play button on a playlist, especially considering its been mentioned multiple times since 2012, and in 7 years something this obvious has not been added.