You paid for an unfinished game and they delivered to you an unfinished game. They don't owe anyone more than that. I'm guessing you have many many hours in the game look at it as you've already gotten your money's worth and anything they end up adding as a bonus. Take a break and look at some other games and come back in 6 months or so and see what they added. Even if a new biome drops tomorrow its still only going to be a small amount of hours to complete it so its not like its going to add 100 hours of gameplay.