Your main concerns with the game are difficulty, down time and underutilized drone. You must have put it on easy and just hammered your way through the whole story. I use my drone constantly, this reminds me of a remark by Angry Joe for FC3, he basically says its your own fault if you play the game wrong. All Killzone games were a walk in the park on easy, normal was always challenging but not to the point of getting frustrated and veteran I just avoided. MP has always been solid. COD should never get more than a 6/10, KZ: SF is an easy 8.5/10.