Weird. I'm really a big fan of Dushuku. I feel like she makes a really good Echo, partly because of that emotional detachment - she's a zombie for large parts of the show, and then she acts well in the parts she needs to. And Faith was, imo, one of the best Buffy Characters. Right up there with Willow.
About the mom episode, I liked that one. I thought that it was interesting in its concept, even if there could have been better ways to present that. I really liked Vows, and the episode with Victor, and next week, with its sierra episode, should be quite interesting. How she came to be a doll will really color my view of the Dollhouse's morality. As it is, I assume that every doll that is there volunteered, and if that is the case, I see nothing immoral, or even particularly amoral, about the Dollhouse. If, however, any of the dolls were forced into it, clearly it is a bad thing. <shrug>
On Summer Glau - I've only seen her in Firefly, but I felt like she really did fantastically. I can't imagine that was an easy role... I dunno. I haven't seen her in SCC, so maybe she really is as bad as people seem to think.