I do 3 a day on my main and two alts. It's really not that big a deal and I cap each week. Would it be nice to have more dungeons, yes. I'm not really sure why they didn't include the last two with the new ones but I suspect even if they did people would fine 4 not enough. I personally don't run lv60 dungeon roulette. I'm not sure what the advantage of running that roulette is really.