Hrmm that whole temporary squad mate thing is going to piss off a lot of people I suspect. I really don't know why they love killing off their party NPCs so much. It doesn't add "dramatic tension" - it just annoys people, and leads exactly to situations like this.
And the comment about the effect of ME 1 & 2 choices makes me inclined to believe they will be completely inconsequential, which was what I always suspected, but is a shame. It actually would be kind of cool if they had the balls to make the 3rd game unwinable based on choices made in the first two. But I guess their target audience wouldn't like that much.