You guys do realize that you're asking Stardock to make a guide that in the Civ V universe was created by a modder right? Is there a Firaxis guide?
I don't believe that I ever mentioned that we needed Stardock to write it. I simply stated that it's what we need. Unless, of course, you want to hire me since i live right off of Pontiac Trail and M-5. 
There are plenty of talented souls here who would love to contribute, I am sure. All I know is that there are a lot of modders just chomping at the bit, but they're stuck in quicksand. As it stands right now, there seems to be quite a bit of XML that gets picked apart piece by piece, and then a roadblock is hit, and there is no way to get past that roadblock. There also seems to be so many tags that are either obsolete or we have no idea what they actually do.
It's an uphill, fruitless battle. There seems to be more speculation than answers. You even posted a thread requesting mod example suggestions that is 15 or so pages long, but I haven't seen anything come of it yet.
Don't get me wrong, I appreciate what you guys are doing. And I get it. You guys are busy. But there is nothing more frustrating than wasting a couple/few hours trying to figure out what a single tag does, only to find out that it doesn't do anything.
A weekly one hour Q&A? A forum dedicated to XML tags and code snippets that's monitored? We need to get tossed a bone every once in a while.