Teams that refuse to work together will suffer quickly, mostly because the Helghast are practically capable of smelling blood. If the enemy AI has captured a majority of the control points, the game's difficulty will intensify significantly and the soldiers will use their numbers to their advantage. The Helghast will quickly suppress players with nonstop fire, grenades, and additional soldiers to the point that a comeback is all but impossible. Still yet, the Helghast can call in champion-level reinforcements, though I did not encounter this during my hands-on time.
Harder still, since the goal of the game is to acquire Team Score, constantly dipping into it to respawn only draws out the battle further with no hope of winning. In fact, once the Team Score is too low, players cannot respawn at all and the mission is declared a failure. This won't be the kind of game to jump into with random strangers, but tight knit groups should be able to thrive.
Those looking for more class-based play from their Killzone may find what they're looking for with Intercept, which is also set to release as a standalone product later this year. Current owners of Killzone: Shadow Fall will get the first crack at this expansion in June, with Season Pass holders getting it for free.
These ruins comprise one of the four arenas coming in Intercept