Just got out of taking my lads to see it. I usually see war movies first to make sure it's not too intense.
The second time around it's not as impressive as the first, and the one-sidedness of the story comes through pretty hard when one isn't distracted by the imagery. The exec guy's snarky comment about shareholders liking poor returns less than genocide is ridiculous, considering we have the history of WW II (Nazis collaborators, etc.) to look back on. Of course not all Nazi collaborators are universally reviled, so I suppose the existence of a George Soros in 2154 is not out of the question.
Bizarrely, the one, simple explanation of "the planet is a living organism on its own, and the fauna & flora are part of it" is never spoken outright even though it would encapsulate the heroes' argument to the villains. No... it's just greedy corporations (like 20th Century Fox?) raping "the natural world." The irony is calculating the sheer volume of resources and technical training which were expended to make, distribute and promote this film [aka Free Willy Syndrome].
The thing that bugs me the most is that the value of "Unobtanium" is never established beyond a monetary figure--probably because it would explain why so much energy and resources are being dedicated to its acquisition and paint the humans in a more sympathetic light. Additionally, with communications being so advanced it's difficult to accept that human tree-huggers aren't better represented in this impending invasion of the pristine "natural world" scenario. And the end of the film when the "aliens" are sent back to their dying world is, all things considered, a greater act of genocide than peaceful (if tense) co-existence.
The Roger Dean style set designs (why isn't the great man credited?) are still beautiful. It'd just be a lot nicer if the story weren't so weak.