Imagine how much worse queue times would be for those trying to get them done for the first time if the glamour incentive didn't exist for those who had already completed them.

Sometimes I wonder if Alliance raids should be revised at the end of their release expansion to be 12-man (3 Light Parties) instead of 24-man. It could make it easier for players to get groups formed for the older Alliance raid they want to do and likely reduce how often CT comes up for those doing Alliance roulette.