See, I'm baffled by this one, now I've only seen the first movie so maybe there's something in the second I don't know about in world building. But the first, the world building was to me... meh? Okay, the alien planet was interesting, they have a culture, they seemed to do a fine job with that, cool. But the story makes humanity so blitheringly stupid that I cannot comprehend the worldbuilding beyond "We need some Captain Planet level villains." They're after unobtanium, a mineral that has properties for anti-gravity and wrecking havok on radar. Soooooo.... We're going to work hard on inserting someone to convince the locals to dig up under the religious tree for the major vein of it instead of the MULTIPLE floating mountains all over the place.

Which then when the military decides to do its thing, this spacefaring species uses glorified helicopters that fly lower and slower than modern military aircraft, again through the mountains of unobtainium in a low altitude approach for a strike operation that only makes sense if the enemy has radar... which the aliens definitely did not. I seriously might have missed something but I couldn't get past humanity in it was just carrying the idiot ball throughout the movie.