I think that for some there is a delusion that all patches must have instances that are made to entertain endgame players with at least 1-2 60s.

From what i experienced in running the 1-50 including some chaotic 4 healer groups, the 1-50 floors seem more leaning toward how to cooperate quicker and optimize your play skills. As said, it kinda punishes those who just jump ahead sometimes or just are slow as hell (hello explosions and mob pop traps)
There is something that we can all learn here whether lower level or high and even 60 players may not be as great as they think they are despite all lv60 classes. (like i seen tanks rush ahead w multiple mobs to kill them quicker and then die to a land mine LOL) Because if someone screws up, its not always their fault if the rest of the party cannot adapt to the hectic situation.