I think Goddard and Deknight did a bit. They did the episode Damage on Angel and Dana feels like a direct criticism of the empowerment spell. Also its interesting that Dana never shows up again or is mentioned in the Buffy comics eitherIt's not about the events but the metaphor, and how incongruous they are with each other. Now if it was done better that would be a different thing. The only funny part is here we all are trying to make sense of nonsensical season 7 again, showing that we care far more than the writers or even Joss did at that point.