as I see it they seemed to start off as BSG with Star Gate Elements. I kinda like the story elements but I'm severely dissappointed by the lack of "star gateness" Although the sand creature stealing their water was a decent star gate like episode and so was the one about everyone being sick and using the time travel through the gate part. Those were worthy gate episodes, but the whole stone comunitcator kinda takes away, I liked it more where they had no communication, or limited. And I don't like how everyone has a agenda and planing against each other, very unlike SG to do. While SGA felt like more of the same, but eventually came into its own, I got a feeling SGU will to. I think with these 10 "pilot" episodes they are hopefully listening to the fans and taking suggestions.
As with the sex stuff, more than possible in the situation, we don't if Chloe and Scott had a previous relationship, they kinda hinted at it. But either way she may be falling hard for someone because her dad just died in front of her and it maybe how shes dealing with it.