That about sums up the information that I've gathered as well, but it doesn't make sense. Apple counsel was very clear that Spotify was breaking Apple's developer guidelines with their latest app. None of the actions you listed are breaking the guidelines. So, one of two things must be occurring:
1) Apple's lawyer is lying about the app breaking the rules.
2) There's something else in the app that hasn't been made public that is violating the rules.
I don't know about you, but I just can't fathom Apple's lawyers flat out lying about the app. Apple relies too much on developer goodwill to completely screw over a big developer so capriciously. I think there's more to this story than either side is willing to discuss, and it's my opinion that Spotify put one toe over the line in the sand that Apple has drawn, and Apple is threatening to cut it off.