Good job, help is always welcome. The visible areas were discussed in this tread:
http://forums.civfanatics.com/showthread.php?t=305024
They would be larger than the Broader areas especially for the late pawn civs. We believe that it would help the AI a lot expanding.
Why did you change the WB file, did you actually put visible territory in it. IN general we try to avoid changes in the WB since it is not robust at all. If we decide to make Burgundy a late spawn civ (i.e. not on turn 0) then we will have to change the indexing of the civs, the WB file would only remember that civ X should see tile Y, but Civ X is suddenly different. In short, the Franks would get the visibility of Byzantium and everything would change. Then again, if there is a good reason to change the WB then we will do that. So why the change in the WB?
I'll take a look into this thread, and adjust the visibility.
The WB file was change, cause i added visibility to Burgundians and the Franks (the change to Byzantine in minor). I did that for consistence, if the later civs get some uncovered map the first should get some too. Didn't knew about the "don't touch the WB file" agreement, so i remove this instantly
