The missions are ok and the story fits. Few temporary missions that stressed an old man like me unnecessarily. Here was tinkered to the other game mode and you can play it and it's also fun. Unfortunately, the feeling of "Horde" and "war zone" is (which my favorites were in part 3) with the new games "Overrun" and "execution" is not really comparable ....
My conclusion: GoW 3 was better - no question. But the Judgement has its sunny side and horny sayings!