I believe he is talking about the fact that level fifties can only run one operation per week due to the lockout.
Yeah, it's the fact we can't help out the leftovers in our guild run it after one group goes through all 8 of them are now locked for the week and the leftover members, if there isn't another 8, get shafted and feel bad since they weren't in the other group.
In dcuo we would run raids 2 or 3 times again for other members that weren't part of static groups due to varying availabilities. Members that already ran it once that week were just loot locked, which is the way all mmos should go so they can promote helping guildies. Like I said before, this system is archaic. Even lotro stopped doing that.