Such an option would be very nice. Still remembering farming the Yafaemi Healing set during a content draught pre-EW. 30-60 minutes waiting was the norm, not the exception (especially as a healer). Yes, ofc I can just not switch jobs and not start any cutscenes, in theory. But no way in hell I am afking doing nothing for such a long time, repeatedly, just in case the queue might pop at some point. (I guess you can always craft or gather things, but I'm not an omnicrafter with every character.)
And even without such an extreme niche example, I can imagine more people having this issue once Dawntrail drops. With two new DPS jobs to level, DPS queues will be worse than they already are...