Epic, you mean like... Real war? You know each card is optional too right?
The idea is to add the strategy of defending from within, currently players only ever have to defend borders, wouldn't it be interesting to try something different too?
Also it really places emphasis on recon cards, and strategic defence behind your lines.
You don't have to like it, you don't have to play it either :P
Edit: For a real-world example, look at things like "Operation Market Garden"
https://en.wikipedia.org/wiki/Operation_Market_GardenThe basis for the film "A bridge too far"
I would love to make a scenario based on this, atm that's just not possible...
Edited 1/8/2016 18:42:22