The battle for Bruma was lame. 15 guards or so, Martin, Jauffre, Baurus and yourself agains like 30 Daedra coming little after little.
It was epic.
What I was thinking about some day, if you play in one specific way in the MQ the civil war will escalate to major skirmishes. Walking up the last mountain to face Alduin, you can see a massive battle around it. That battle is in another cell of course and so far away so they can use just some kind of video that play in the background. No need to render behavior for 2000 NPCs if they are just small models like the Total War ons.