Murphy as Diane makes sense, but I admit to casting Lara as Diane because I find Diane both scarily competent and sexy. And El is more...all around awesome and able to kick ass without actually having to kick it. Murph's described as looking more like a favorite aunt or a mom. Which makes me think more El than Diane. Secretly asskicky!

And yes. It would make Kincaid Diane's girlfriend. :D Which might be enough to sway the vote to Murphy as Diane!