Since September deezer is wasting a ton of data from my plan, even if I play only the downloaded songs, I almost never use the offline mode because when I'm in wifi I want to stream flow.
So my suggestion is to add a setting similar to Amazon music, that streams music only if you are in wifi and if you are not in wifi the it plays only downloaded music.
The offline mode is not an option since it has to be toggle manually and it's hidden behind the settings clicks, instead of on top.