Playing another character should not be an option to replay quests in a Quest game. This is still FF, whether devs or anyone doesn't want to admit, msq is -the- main feature, why put locks behind it if it's not. People want to gear other jobs, they're given crafting/gathering for option instead of telling them to play another character. There wouldn't be DF or PF or even instanced anything if people were only allowed to run duties once. It's not a sub or extra thing like raiding or gathering, those are optionals. Questing is the road leading to the theme park stuff. It's not a waste when devs put some effort on the main feature of the game.