Late to the game, but the last two episodes where pretty darn good. I feel i'm going to echo Rui on my thoughts with episode 11, so i'll start there.
The whole segment with Saki and Haruto was pretty intense, haruto never once getting to ask anything on the matter, and saki never really giving a straight answer. What i found made it more interesting was the way it feels like a clash being pretty...socially inept? The awkward feeling between the two is quite evident throughout and it really felt like the best way to approach the "rape" from the episode 10. However saying that, i'm still under the impression that the AI is very much the one that caused it.
Shoko as well just gets hit with more and more bad things, even if she doesn't realise some of them. I think after seeing her losing her dad on camera, and by an oblivious haruto, all i can feel is sorry for her. Saying that, while this wasn't the only reason, i do feel this kind of helps me identify her as probably the best character of the series. I want to say Saki, but Shoko just feels more...interesting at the moment. Also easier to get emotionally attached to.
Now for episode 12. What an end to the first series. Sunrise just threw so much at us that i have more questions than they gave me answers.
Firstly, haruto getting rejected was a little expected, but i still feel sorry for him. He's trying to "make things right" and only gets stopped in doing so. The "forward flashback" was interesting too, and makes me wonder who that kid is. But what an episode to end on. Cain is linked to the "magius" AI-chan talks, and has a brother, unit 2 works, Akira gets unit 6(i honestly said "NO WAY" as this happened, i was so expecting this to be shokos unit). If there is anything sunrise are good at, it's cliffhanger endings. Code Geass did it well, now Valvrave has too.
I honestly think that, there maybe too much content to cover in just two series of 12 episodes. There is obviously a reason they split the seasons up, maybe to gauge interest, but i think there is a lot they could cover in this universe, and i'd be more than happy to learn more about it.