A shrinking map?

[Debaser8]

It seems like big games with lots of people are exciting at first, but bog down into very long turns when a few players start getting eliminated. Is there any way to make shrinking maps or maps that automatically take out magic sites and population from some provinces whenever a player is eliminated or goes AI? Or a script that moves everything from a bigger map to a smaller map? Or is the current state of the map/game data all kept in a turn file that is inaccessible?