I think we all describe 'fun' differently and end game repetition and fun are rarely synonymous. It's a loot game, and to say that Destiny isn't 'grindy' would be a farce. I think most of us want to mitigate the grind, get to the loot, and then do the stuff we actually do enjoy with our friends in Destiny. However, to each his own of course... However, successful MMO's with end game content allowing you to make several runs on the end game generally have a good time cost to reward structure. Otherwise, where's the carrot dangling in front of you to rinse and repeat that 'effort' for 'this' end game experience over and over? The first time you get through and beat Skolas, we can agree - you are in it for the experience and the reward is euphoric pay off. The next 9 times you do it, its less about experience and starts to become you looking at the clock when someone brings up Skolas PvE 35 arena start... as you don't know if you want / can commit that kind of time. 1 hour to get there, and who knows how much time before the boss goes down... and, you don't know if you are getting paid... so, you start to dread this whole sequence of events.