No way sins 2 should be singleplayer only, they should just put in a different multiplayer system.
In multiplayer the diplomacy is so much cooler.
spying on people, sharin ur info with ur ally or his enemy and havin em think ur HIS ally and backstabbin him in the end is just the best
especially in 8-10 player games where aliances tend to change allot and ur trying to stay credibel after backstabbin 2 players, and finaly win with 1 ally
also u can talk with people and plan strategies and shit wich is also impossible in single player, ye u can ping, ask for defence or ask the ai to attack but thats not the same.
so in my oppinion takin out the multiplayer completely -even though it kinda sucks right now- would be herrecy.
Just fix a different system.
a campaing would be nice though.......