Spotify new feature?

[Swaggxlown]

I was already told this was a new feature they are testing? I'm not able to add songs within my playlist, and I can't listen to the trails of the songs in my own playlists. Honestly it's quite bothersome. I don't enjoy this new feature because i rely on auditory to know what fits my playlists or not, especially a week after i add the songs. I'm also sometimes needing to quickly put a song in a playlist so i wouldn't forget to. Please get these 2 features back as they were really helpful for non premium users, such as me. 

Thank you.