I'm all for a 'allow unusual party size' Checkbox for already cleared content and daily randoms. No tank or heal available, no problem just send in 4 DD's but mobs will hit softer. Too many DD's in Queue, have 1 tank/heal and lots of DD's. Just give the mobs more HP for each extra DD. You can't even argue this will trivialize content since it is already super easy to begin with and you already cleared it to unlock said checkbox.