Originally Posted by
polyphonica
The tank/healer would take the penalty for that withdrawal, though. So sure, they probably could do that, but they can't just keep on doing it indefinitely without being penalized. And I'd still tend to think that, most of the time, they'd be better off just running the instance, since they often get role bonuses too (tanks in particular). The tanks/healers in question could do more or less the same thing you just described as it stands by simply exiting the instance after it pops, which then requires another tank/healer to queue with "in progress".