Not gonna lie, I’m considering paying for Deezer to move back to this.
You can automate downloads with Lidarr. I’m set up to download every song by every artist that Last.FM recommends.
Currently, I’m using Soularr, but it’s really slow and not always FLAC and not always full albums and the metadata is not always perfect.
At the very least, be sure to put your current library out on soulseek.