Spore also lacks multiplayer, which is devastating considering how incredible multiplayer could be for such a game. Even with its lack of thought, pitting players against each other would allow for the most extreme form of intelligent multiplayer gameplay, in any section above the tribal stage. It would essentially be Tribal Wars in three dimensions; addictive, creative, strategic and fun.
These two things, as well as the lack of purpose with creations, puts Spore farther back than GWN expected based on the tens of previews and videos they have seen on the game. In the end it's just another trip to the playground. Fun for a time, but not exciting or inspiring.