I dont wanna work anymore!
Think about it logically. If they bring out a seriuos FPS, they will be up against the likes of BF3, MW3, MoH or even Op.Flashoint.
So you run a seriuos risk of just making up the numbers in an already over-populated genre....
Why not try something different... something new that could just create it's own niche....
I think it looks interesting and worth my money to try.
And if they do release other's later as follow on's from the originals.... well great!! But like Bad Company was to Battlefield..... this to BiA!! Well done chaps!