And I remember you speculating that freedom might have played a role in her affection, but I don't remember that being confirmed?

No, the term "freedom" is from the quote from Achim von Arnim (who in turn quotes his grandmother) which is posted on the Zernikow website, along with the "harmony and inner cheerfulness". That she used the term "Freiheit" to describe her first marriage was what made me speculate!

I'll check out the others when I can.