I like the idea of having *one* exclusion option. Main reason is myself and my friends are doing MSQ together but have different schedules. When they're not free to continue, I jump around solo. But multiple times I cannot run the levelling roulette (or trial roulette, or whatever) because I might get the one for the next step in the MSQ and have to drop. I've seen several others have the same issue, where their alt jobs catch up to a level where the 'pause' duty is now available and they have to stop running stuff solo until others catch up.

So yeah, being able to veto a single option to stop yourself getting the duty you promised others you'd wait on them for, or just cannot stand, shouldn't be that big of a deal. After all, even if it's the latter, better to have. A slightly longer wait time while you can be doing hunts or side quests or crafting or whatever, than get in and have someone drop instantly and then have to wait out that extra time inside the duty.