Minear talks about the Darla arc amongst other things in an interview that was linked at Whedonesque:
http://whedonesque.com/comments/26357
I slightly misremembered it according to Emmie's summary in the comments
"Some of the storytelling decisions revealed in this interview are incredibly interesting. Like how Angel was even more rough with Darla before sleeping with her and that Tim had originally planned for Angel to stake Darla upon consummation. Then there was discussion of Darla's death to give life to Connor, again originally planned as a doctor staking Darla as like a vampire c-section -- and Joss suggested that she stake herself."
no subject
http://whedonesque.com/comments/26357
I slightly misremembered it according to Emmie's summary in the comments
"Some of the storytelling decisions revealed in this interview are incredibly interesting. Like how Angel was even more rough with Darla before sleeping with her and that Tim had originally planned for Angel to stake Darla upon consummation. Then there was discussion of Darla's death to give life to Connor, again originally planned as a doctor staking Darla as like a vampire c-section -- and Joss suggested that she stake herself."