The aspect of this that I'm really encouraged by is the size of the campaign maps. We're now getting 4 completely new maps of regions that have far more detail than most modders have been able to achieve. Even though it looks like there are only a few factions in each campaign, there's no reason why modders can't easily alter that and make each individual campaign into a massive game of its own. For instance, the British Isles map appears to only have 4 factions, but is easily large enough to support 15. That alone makes it a gold mine for the modding groups.