Loved it!
No. No. And finally--no. I'm not going to critique the story for this movie. It was a tribute to a specific genre. One that I recognize fully. Despite the handful of naysayers out there nitpicking the plot, I felt the post-apocalyptic setting, the action, and even the (admittedly cliche) boss fight all fall perfectly into the niche for a science fiction tribute. These things are ubiquitous within the genre and so make perfect sense to me. None of it has to be some over-moralizing political statement or some strong opinion about the state of humanity. There are far more compelling stories that already do that in the genre. Avatar merely paves the way for those who haven't quite understood what SF was all about. Now, here's a movie that might help them understand.
For so many, science fiction is about immersing the mind in an unfamiliar environment in order to discover things from a perspective they never knew they could have. It's about the transition from human to something more. Discovering limitations and breaking through them. Finding your feet planted on the ground and then learning to fly.