ROFD is an obvious turning point - the new lvl cap , new mobs , DCZ , new xp quests , BF ect. I personally think ROFD made many aspects of the game far too easy but in the same breath took the edge out of pk.
In KE I found myself and my friends on the top of our game , ROFD came out and we were still there but the difference was what took us years to achive was now possible in a matter of weeks. I will still argue till I'm blue in my face and half the forum is banned ( Yeah admin abuse _|_ ) that lvl 70 as the max level was harder to stay alive than being lvl 80 is now. Because of the mass advantage of being level 80 people are not getting the fights or challanges that we are use to seeing in KO and KE.