Drat, double post. I'm even using stupid FF!
Actually that's just part of the forum growing pains. It happens at every page break. When you post something that causes a new page to be added the new post won't appear until an additional reply is added and then both appear. Assumedly they'll get that fixed sooner or later. But in the meantime you can either double post and hopefully edit your second post or wait for someone to post after you.
As far as the documentation it was in the MVC area at the Core but that's apparently empty now. I periodically check-in but don't go to the Core nearly as often as I used to and haven't checked the MVC area for probably close to a year now.
There was a recent upgrade of the Core and the Archive and Trash areas are empty as well. Don't know what or when it happened but it seems that the original documents are gone. The only thing I have to go by are the links from the OP of http://forums.galciv2.com/151565, the AltMeta Class Beta thread.
Basically there was a little verbage describing the AltMeta score deprecation of 1/6th of its value per month until it decays to zero after 6 months and a bit of justification as to why this is a reasonable way to score folks.
Then there was a description of the classes which is essentially the information Kryo listed above.
There were another two sections, one that merely described the top ten lists for each of the 6 classes and All Time categories and one that merely listed all the character details. These are pretty self explanatory anyway.
The only other info was a description of the Data Chart options with a few suggestions of what size versus score or class versus score or score versus score charts could be useful for. If I recall correctly these were accompanied by a bunch of pictures that had been stored at the original AltMeta location but were lost when it was moved. In any case I don't believe this information was really all that helpful and people probably just had to figure out the charting options by themselves anyway.
That's all I can come up with.