You will get better tools from fans than you will from the developers. Even if Firaxis released an Uber Power Tool Editing SDK on par with Visual Studio et al, it would most likely prove insufficient.
This is because no developer can properly anticipate how end-users will utilize their product. Firaxis announcing that "We give you the game now, and then the SDK later" was actually quite an intelligent move on their part. Now they can watch the fan forums, read some complaint emails, and actually release a modding tool that the players want.
For those who are impatient, well I cant help you there. I do know that there are many fans who are working hard to release some mods, patches, tools, and otherwise that should whet your appetite. And you KNOW Snoopy is about to drop something too.
Now if you'll excuse me, I have some Aztecans to sweep off my doorstep.