Ok lets point out some other flaws.
The planet’s atmosphere will kill a human (we saw this play a major role in the plot) and yet all of the attack Copters (why does every sci fi use a Huey as a template) had open cock pits to the crew area and yet many of the pilots never wore breathing masks in the front but the guys in the back did. The pilots must be able to breathe the “deadly” atmosphere without the need of a gas mask.
Up in the floating mountains the wind never blows even though they climb several thousand feet. The mountains never bump into each other or move at all. (Must be made of floatbutnevermoveevertainium)
When the great tree fell and hit the ground people didn’t fly hundreds of feet in the air like they would if something larger and with something of such mass and scale as the great tree would have caused if it actually hit the ground. (The shockwave alone should have killed about everyone). We never saw a huge blast wave or massive amounts of dust and debris. It fell like a small tree and never caused the ground to “bump” from the collision of falling down from a height miles up.
The Blue Smurf race “bond” with all animals on the planet through their pony tails but don’t bond with each other while mating?
Flying animals bond for life and yet he let the great orange starburst dinosaur go after one day’s use?
The marine main character was a “warrior” and never thought of having all the flying mounts hold logs and drop logs into the fan blades of all the flying machines? The Ewoks in star wars were smarter about using low tech to fight a high tech force. (Remember tree log traps smashing AT walkers?)
ICU? Rip off of American Indian beliefs?
The technology advancements are so far in the future and yet the Military is still using “Daisy Cutters” as their most advanced attack?
The Walking attack machines were a blatant rip off of the ones used in Matrix which were ripped off from the Loading machines in Aliens.
He learns an alien language fluently in less than 90 days while also learning all of their customs, beliefs, and how to interface with animals through the “bond”? The guy has to be the faster learner on the planet.
They point out the smurfs have carbon fiber skeletons and yet they die just as easily as humans? Whats the point?
When they “escaped” in a battle transport (wanna be offsprey) they somehow had all the cabling they needed to lift a lab in secret and fly it miles away. And speaking of which, why did they need a Avatar Smurf riding on top of the lab in flight? Was he holding the cables in one hand or just there for eye candy?
The scientist guy who helped the marine fought in a battle and his “avatar” was killed. If they are so expensive, and so hard to make, how did he have a second one that looked just like the first one in the end when they were escorting everyone out of the main base. Does everyone get a buy one get one free deal or did he whip one up after the battle but before escorting everyone off base?
Another point is the Battle Transport (pictured below)

How does it fly forward so fast when the “fans” never rotate to a 90 degree (facing forward) configuration. They might rotate a few degrees forward but then they would never generate a good forward momentum. They would be rather slow. Some how this miraculous Huey’s with fans were highly maneuverable and could fly forward really fast with no obvious form of forward propulsion. (Maybe they were made of fastatainum).
They were so focused on making 10 foot smurfs they made everything in CGI when they could have saved millions if they would have made the smurfs normal human size and just used make up.
Ok the humans are vastly advanced when it comes to all kinds of “technology”, they can interface with “avatars” in link beds, they have advanced computers and gear and yet someone gets hit with one bullet in the side and they have no advanced First Aid available. They couldn;t even fork up some band aids, a few stitches, or even some glue. Nope. They have to go ask an alien race who’s biggest technological advancement is the Bow and Arrow for First Aid and how to “heal” a bullet wound, which of course failed.
In the begining the marine in the wheel chair almost gets run over by a huge dump truck. Why would you drive a dump truck that size in the middle of an airport and between the shuttles and the base. Any manager with half a brain would say OK transportation over here on this side of the base and construction over there on that side of the base…
If the marine could travel to all the outlying tribes so quickly, why did it take so long for them to arrive in one location? He visited all the tribes in what looked like one night and yet it was taking days for those tribes to travel back the same distance. Maybe the marine had some of the “fastatainum” on his person.
If that mineral is vastly expensive do we honestly believe that the mining company will leave and never come back and attack the smurfs? They will just fly back with more weapons.
If the Vortex is a place where no systems work how do the machines still fly in all that interference? Since guidance does not work how do they know how to get there?
If no guidance works how do they know exactly where the “Sacred Area” is?
Why is the shuttle painted like the Real shuttle and not painted green?
Why is everything just plain green? Why not paint camouflage on the vehicles and use neon colors? I would think a solid green machine flying through a neon Forest would be easy to spot?
Why were the walking machines silver and not green? They run out of paint?
Why did the walking machines need to carry large machine guns? Why not just attach them to the arms like in the Matrix?
Was it me or did the walking machines seem rather wide and bowlegged? WHy couldn;t they make them more narrow so they could fit in tighter places?
How does a Blue Smurf block blows from a metal Goliath with only a slim piece of metal? I guess physics and the idea of MASS and FORCE play no part…
Why all the political environmental interlaced in the movie? Does James Cameron recycle and use little to no electricity? I mean his choice of having to have 10 foot smurfs increased all the CGI needed by tenfold which of course increased all the electricity needed to power the computers to make all that CGI which in turn kinda goes against his whole “enviro” message which is apparent throughout the movie.
So is the new type of western? “Cowboys and Indians” done in shades of blue?
Dances with Smurfs?
I could go on and on and on…
But I did enjoy the movie. I was entertained watching it. But I was also entertained when I watched the movie JACKASS so…
In the end the movie is an eye candy good versus easy predictable flick. Good the first time but lacked so much in plot and believability.
I would say geared more towards teenagers with short memory spans.