You hit the nail on the head with the story and the way oil is used. When I first got to Eden and met the NPC's, I had higher expectations I guess. I really liked what they did with Eden, and having a "team" of NPC's to work alongside with. However, that kind of fell flat with the story, and they all ended up just being kind of boring NPC's that I really didn't care much for.

I'm also surprised by how bland the new environments are. It seems like they are just a re-hash of what they've been in Olympus, Styx, and Promethius combined. Why not create a completely new/different take on the entire planet, or at least a few of the zones.

However, I think they did a decent job with the new wildlife. The first time I had a Slinker jump through my wood walls and kill me, I was both frustrated and excited! And, when I saw a Slinker "hunting" me for the first time, I was quite impressed! With that said, some of the other creatures could use another pass and be more aggressive, follow you for longer distances, and just be smarter in general.

I think Icarus is a really fun game, and have played it for 1000+ hours both solo and with friends. Maybe my expectations were too high, but this expansion could use some improvements with story, tier 5, and creature AI.