There's no doubt Sony's still trying to get itself together to compete on the same level as the Xbox360's online features. But they are improving things... slowly...
Regarding Killzone 2 though, the v1.27 patch released a few weeks ago included a new control mode called "high precision mode". This was basically a fix for all the people who were complaining about Killzone 2's controls.
I didn't have anything good to say about the controls when I first started playing it, but after installing v1.27 and activating the new mode (it's turned off by default for existing saved games), something odd happened. I actually started enjoying playing the game. You could say I started fighting the Helghast, instead of fighting the controls.
If the controls put you off by Killzone 2 before, now would be a good time to try it out again.