You just discovered that awesome song, so you add it to your playlist. But wait, I want this song at the top. By selecting "edit" you can rearrange tracks manually from the mobile app. Doesn't help when you have to scroll down 2,000 songs just to reach the bottom. There lies your song which then you hold down on it as it slowly moves up the list. This takes me about a minute for the song to reach the top
At the very bottom where you see the song "now playing" why not just hold down and drag the song to your playlist. Brilliant!