This was key to me:
"believed although the gameplay offers a lot of variety, it also offers little depth"
I would likely be one of those who was underwhelmed. I enjoyed the game, but I suppose the thing that disappointed me was that it had so much potential that I didn't feel it lived up to. There wasn't the sort of depth to it that I felt there could have been. 10 hours on the campaign with the abrupt ending you mentioned, platforming that flirted with exploration without letting you actually EXPLORE (rather than just follow a relatively linear path). I was also slightly disappointed with the environments, but that's my own fault. When I first heard in the previews of the game that it was going to be a post-apocalypse that abandoned the slightly overdone rust & grime take on apocalyptic landscapes, I was incredibly excited. While the atmospheres were cool, I felt like they could have done much lusher environments. I think I was expecting something closer to a mix of Farcry 3's overgrown grasses, trees and forests mixed with Mirror's Edge's suburban sprawl -- if you can imagine it. What we got was something not bad, but very very different (with the exception of a moment here or there -- like the aquarium that was still standing, I remember that vision vividly). So that expectation is purely my own fault.
