I found it to be much more mature than the first one. the first one wasnt serious enough (just look at the dumb face the max payne actor always makes). the actors (not the main voice actor tho) were pretty untalented (I bet they took the programmers for the pictures).
but I agree, it was pretty short. thats a bit sad.
I have given up on waiting for BIS to come back to their senses and do a real ArmA 2 successor.