ive been told that they just ported it to pc, and its having alot of random issues(SLI issues, textures, crashes, etc. unless they fixed it by now), and was told the multiplayer could have been better. Chaos theory still has the better multiplayer that we all remember and love. They dumbed down the multiplayer by adding invisible walls to vents, as well as allowing the spies to have smg's to shoot the mercs. The spies also have some sort of insta-kill grab that can be performed even when toe-to-toe with the big bad merc. As well as most of the games just turning into deathmatches where the spies dont hide, but just run around killing the mercs with smg's and flashbang/knives. I was told they have a classic mode, but im not sure if thats true or not, as i dont own it and couldnt tell ya whats included with that.
Could just be chaos since the game just launched and people dont know how to play yet.
Editing on to add more stuff im reading about:
I dont remember this in the older multiplayer, but your night vision gives you the glowing dots and makes u visible in the dark, kinda pointless lol, might as well not use them then. Also all the levels are supposedly very small and very well lit unless playing in the classic mode.