Originally Posted by
Reynhart
Lacking a member is always a hindrance, but there is a big difference between someone quiting and someone doing poorly. If your tank or your healer is not fulfilling your expectation, the it's your choice if you want to kick them. If, after that, you have to wait 10-15 minutes for a replacement, it's the party's fault.
Often, you can still go faster with a basic tanking, than waiting 15 minutes to be able to kick them, then waiting for a replacement, and then ending with a proper to finish the dungeon quickly.
Remember that the main issue is the Duty Roulette, and that there is absolutely no Duty in there that requires a great amount of skill. As a tank, it's perfectly doable to survive pretty much anything without using a single cooldown, even if it's a blatant lack of skill.