To be honest I haven't thought about it too much. I mean there are a lot of choices. What about Lilly's dad, couldn't he have been saved in episode 2, could he still be alive? Maybe not, I haven't looked in to all the possible outcomes.
I guess your decisions change the game to a point, right up to the end of Episode 3 at least. Maybe now everyone is essentially at the same place and the decisions will now change the end of the game for everyone. As I said, I haven't really looked in to it or thought about it all that much, just enjoying the storyline.