Instead of being locked to a certain Instance. Why not be locked to the boss? or Even better locked to the Loot on that boss? I know a lot of time I start a raid get half way through it and I couldn't make it back when my guild runs the other half, then i'm pretty much stuck with the Dungeon and can't finish it for that week. I see a lot of people and guildies always posting for things and I wish i could help but I'm locked or don't want to jump into a raid group that is already half way through the dungeon, especially the last boss.