I'm with Farmer Harv on the DLC front. Although I'm sure you sell DLC to a lot less people, surely it takes a lot less resource to create?
Apart from creating a few new 3d assets and artwork, it's one man and a scenario builder (vs an entire team for a new engine / AI etc).
Maybe I'll get some modern scenarios after all lol!
Btw as a Brit i loved the Operation Sealion campaign. Sure there are a few mechanics niggles (trying to find your units due to a mass of buildings etc), but I really did feel sorry for my Rourkes Drift units when they finally succumbed!