The thing that bothers me, and bothered me when I saw the E3 videos, is the almost complete lack of dialogue choices. Even on the role-playing mode. Has Bioware confirmed that they were cut from the demo? I won't be at all happy if this is how the final game is.
They confirmed that choices were cut from the first (intro) segment.
I don't know if they confirmed that choices were cut from what we saw in the second segment, but it definitely lost a lot of (probably spoiler-y) dialogue, so I wouldn't be concerned about its lack of choices either.