After 10 times using the new djay 2 the app needs about 20 seconds to load the playlists over the plus button, both sides!
We just released version 2.0.2 of djay, which includes performance improvements for the library. Please let us know if that fixes the issue you are seeing.
If you are using a beta version of iOS 7, we will make sure djay works correctly on iOS 7 when it is publicly released.