Meh. I'd rather they focus on squashing bugs and fixing errors so that as more people purchase and play the game, they can have a proper experience.
This is a kinda short sighted reply. I don't think you understand. Not only does a toolset that allows custom content allow the community to make extra things for the game, it allows them to fix the game itself.
From what I've seen with other games with toolsets, the community often does a better job at fixing the game than the devs. They would certainly add to it at the least and make it even more playable than it is.