I dl it and checked it out, probably one of the shortest demo's I have ever played. It was fun, although I find the First Person squad thing a bit clumsy. Controls were odd and the game felt -disconnected-. However, it did look really nice and the I love the small little cinematic things thats that happen... and the God Of War style key pressing interactive moments. Not my style of game (I hate getting scared) but others will probably love it.
The controls feel fine to me; I think the slow windup before turning and lurching different directions was a developer nod toward realism (moving heavy guns and bodies takes a brief moment to accelerate). For me, it adds a some extra tension to every situation because you take a little punishment for lack of anticipation.
Physical momentum aside, though, turning the motion blur off or at least to "Low" helps it have a more traditional feel.
And yes, enemies are pretty stupid in the demo. Some use tactics--like covering from above while melee fights below--but they look scripted. Plus they climb over each other to get at their targets.