I'm not sold on it solely because it's not true multiplayer. I'd rather there be substantially fewer planets if it meant I could actually form a community on one of them.
It's a fun idea and it has a large scope, but I feel it's been too long coming for it to live up to it's hype, and it seems to be delivering too little for that wait from what they've shown. It's essentially a single player only experience, selling at a triple A game cost, but providing an indie game's level of depth. It leaves me worried that the game will largely be proof of concept, a technical feat in procedural generated scope, but flop in it's actual game play value.