I agree. Although I think in this case at first they had an idea, making an infinite universe you can explore and adding things to it and that's it. From what I followed they didn't know much else. It's not like it's incomplete it's simply new ideas that weren't thought before in that deadline. You gotta remember they're just a group of 10 developers and what they're doing is revolutionary in the world of games.
There's no "limit" to what can be added to a game with an infinite "world map", any idea can be thrown in. So I expect dozens of game changing patches once they start getting feedback from the fan base.
And btw, my first though after playing 3 hours is that it's everything I expected, nothing more, nothing less. It's a survival, exploration Minecraft-like game. So far I'm having an enjoyable experience.