Yes, I will add you to the beta, but there is a new roadblock in the path to supporting Spotify...
For a commercial app (the 4.99 price point of wsdj qualifies) to support Spotify music sources, I must have written consent from Spotify. I did apply for that consent a week or so ago, but I have heard nothing back and from what I read in forums, it can take years to get a response and they are pretty picky on giving that consent so I'm not sure I will get the approval.
I do have much of the functionality working to support Spotify, but for the moment I have suspended that effort pending Spotify approval.
There are some other important features on the wsdj todo list so I do plan a beta some time in early summer for those and you will get notice of that beta release from Apple when it is available.