Not owning the new DLC really screws you over in MP games. before it came out you couldn´t boost party popularity or stage a coup against other players. But now it´s possible again, sure you could use your spies to work against it...... unless you play without that DLC and can do absolutely nothing. every other player can just compoletly screw you over by just boosting party popularity from the start and stage a coup later and you just have to take it....