Spoiler alert!!
Those negative reviews are exaggerating. I really do not understand why there are a lot of hate words and statements that deny the whole effort of the production team and the cast put in making this sequel (actually a prequel). Part 2 does not fully meet my expectation, which was set truly high due to part 1 but I respect this work. Some unreasonable events (e.g. how the Loyal could possibly go up everytime they want when once you go down, you can’t do the opposite??), too short and fast development on the side characters (apart from Zamaitin, others seem a little dull to me, did hope to see more on their background and reason to be in the pit), the zero-gravity scene seems odd and out of the plot (there might be later explanation on next part), lack of involvement from the administator (really want to open the door step-by-step to the system behind the VSMC).
However, the contrast on capitalism and communism are metaphorized fairly good, practical and easy to absorb. Besides, how the religion, belief, ego, greed and mediocrity of human have us build this long-existing social system with full of inevitable flaws. This movie does not tell us what to do, which to choose. Instead, it shows us different view points, different lives, struggles, evils that all happened in the same pit. The thing I most love about this series (part 1 + 2) is its constant message: “The child is the message”. We might have completed our journeys, but they have chances. Only they could go up, they are the message without any barrier, they are the future and the hope. Whatever system or belief we take, keep in mind the need to make the world safer, better place for our children to grow.