Anyone else playing it for PC/PS3/XBox360?
I'm not sure if they developed different versions for the three platforms like they did with the first one. But I'm playing the PC version and so far the balancing is terrible, you can Rambo through the missions. I didn't even need my team for the first one, all I needed was a silenced M14 w/ scope, an MP5SD, and a silenced M9. I essentially mopped up the entire map on my own without getting hurt.
All you need to do is make sure you have silenced weapons, crouch or crawl when you're near the enemy, and use the overhead view. Do those three things and you'll wipe out every bad guy on the map without them even knowing you were there.