Pagan has told anybody that their will never be any changes of any type unless a discovery of a 'trick' is found in play. Even thought it was Cousin Joe who created it, Pagan is basically in charge of it and only seems to tweek the wording on it, and very minor changes were concluded. I have never known them to change any of their NA's except very modestly to remove any perceived ambiguities.
So essentially its a closed system. What changes you speak of wont get done, certainly not changing the Victory cities.
That's not to say we can not create our own victory rules utilizing the same 'Enhanced rules'. I would be interested to see how more VC's changes the game.
This could become an alternate / optional rule that could realistically be added to the Enhanced Rules if they turn out to be balanced and fun.