I have no problem with changing the map when one of these things happens - keep in mind this isn't a roll the dice kind of game - it's photo stories. It takes a lot of time and effort to properly show a war in photos. How long has George had this 'newest' war in the works? A year? With the current activity level I doubt there would be all that many map changes. Most of us are happy where we are at anyway. With a break in there for the Krull joust it would be in the fall of this year at the earliest that George's war storyline would be at the point of a treaty and the actual map change. Storyline discussions between members for any other map changes within this calendar year would have to get started pretty soon to have anything actually get done. I think if we focus on this having to be photo stories, and any battle scenes to win a war would have to be extensive enough to convince the rest of us that a territory change would be a reasonable result, then it isn't really that easy of a hurdle to jump. It's not enough to say what's happened like a role play - you have to set up your Playmo, take photos, and convince us it's happened. I'm sure right now that George is at or beyond any size limit we would set, so for him to get a colony under a flux version he would have to give up some of the land he holds now. So that would have to be part of the results as well.
Having said that, if we really want to just lock things in I am fine with that. But it must mean just that. That means the results of your war George, or any other war, will not be any change in the map. The only way the map would change in the future is if someone new comes along and takes a territory. That's not the way it's been done in the past with the last war that happened, but most of that war was out of the rules guidelines anyway, something that wont happen again regardless.
If we're not going to set a size limit and allow flux within that, then I don't see any other way to remain fair to everyone than to just lock it in and be done with it.