This may be one of the most hyped media properties of the last two years. There was no way the finished product would live up to expectations, especially when those were built on unrealistic assumptions.
This isn't an outer-space shoot 'em up. Players looking for a fast-paced action game are going to be disappointed. Is it the fault of the developers? No. They promised an exploration game built on a dynamic, procedurally-generated universe. On that score, they delivered.
What we do get is a haunting, quiet experience. It rewards, well, just walking around and enjoying the world it creates. There are no easy answers, and the player is expected to figure out the mechanics and lore himself. Its only presumption is that we simply live in it, which is a brave design choice on its own.