I was just going back through all known FE data and I noticed that it will add a whole bunch of new terrain types. That means that there will be new tactical maps, hopefully, to fight in that terrain. That means that new tile art will be created. I hope this means we will see entire environments with a specific theme: ice, fire, mountains, hills, plains, swamps, jungle, forest, desert, undead, angelic, ancient civilization, battlefield remnants, ruined city, etc... I can't tell if Kingdoms and Empires will overwrite these places once conquered, but that would make sense. New tactical maps will hopefully reflect the area your are fighting in. For that matter, quests need to do likewise. This is kind of a key juncture for immersion. Call it rationality if you want.