See songs marked as favorites with a small icon independent of the (+) Plus button.

[03-ckyvl_ivh5]

Many users want to see the songs they have marked as favorites in their playlists across Spotify (our own playlists, other people's playlists, albums, artist profiles, etc.). A small symbol next to these favorite songs, separate from the (+) Plus Button, would be interesting and convenient. It's strange that in a music streaming service you can't see your favorite songs at a glance.

[eva_cs]

This is so important to me. It used to be a feature up until recently/within the last year. It doesn't make any sense to get rid of this feature that served a helpful unique purpose, on both desktop and mobile.

[danzabarr]

The old 'heart' system was much better.

Liking a song is not the same as adding it to a playlist. If it were, then the 'liked songs' playlist ought to appear on a public profile.