Doh! I will fix your name in the next build! I'm terrible for spelling... then once I spelled it wrong once, I just refered to that one, or cut and paste....so its likely wrong everywhere!
It's actually at three sizes now for an idea I had added to the pile, but I'm still tinkering with. Funny you mention it, because that's my next task: handling grid sizes and randomizing numPlayers (or at least at this point, numCityStates, just for variety)
I was noticing that mountains still aren't looking right when I was doing screenshots in game, and I'm not so fond of the 5-6 tile thick mountain ranges either. I'll take your advice look first at the grains though, thanks.
As for the worldBuilder, I use it to quickly see results, and the log (if using the Unofficial Patched version) makes an awesome debugger. just save your lua and hit generate map in WorldBuilder, instant feedback (unless of course you change anything in GetMapScriptInfo() or GetMapInitData() then you need to relaunch WorldBuilder). I just haven't bothered with accounting for it, just as easy for me to manually change the values. I'm leaving that to the end too.
I like the idea of Culture grouping and stuff, I might see about a lake or two more and adjust the available land accordingly, and there are a dozen or so more aesthetic things I would like to tweak, but all that will be last, since aesthetic is pretty subjective and will likely take some time.
Any feature I add from here on in, I would like to make into an option, if it can't be tied in with an existing one.
And help yourself to any code or ideas you like, just make sure you spell MY name right!
Cheers!