This fits in with the scenario model floating around as well.
Along with the big nation map, when you want a specific part of a campaign or scenario you pull a cutout game. The 50 person map would have the big picture, the small game/map would have the scenario. Much easier map mod, but might be a bit difficult to synch up.
For instance, the bit map would show the situation above such as Jot recently taking a caelum province. The small map would have just 10 provinces or so, with the 2 relevent nations and any specific quest rewards/objectives/challenges modded in. Wouldn't affect the big map, and really don't want it to unless your PCs are at the level where they do world changing events. After the scenario the large map still stays relatively the same, still providing flavor and direction.
For the small map you could even mod the players directly into the game.. 4 or 5 commanders, whatever followers starting in one barren corner with relevent EQ...and see what happens
