There's another negative side to content lockouts I didn't notice anyone mentioning yet: people who run content like this in their own static groups won't be able to help others. These people are usually also the most skillful ones in said content, those people who will join newbie groups just to assist and give some advice. I really wouldn't want to go back to XI style lockouts as they serve no purpose at all. They will also add an even higher pressure for succeeding as people don't want to waste one of their rare weekly runs for a group that might fail to complete the dungeon.