You can actually complete all the dailies. The thing is you can only accept and complete them (balaur, jotun, and oathbound worshipper quests) one at a time. So after you finish one, you have to go back to the questgiver npc to get another. I agree with what you said though.
I do have to say though that you can just grind the mobs, manually or auto-hunt, and you can get the renown easily. Or if you get lucky to see them, kill a mini-boss or two when they spawn for bigger increase and a chance for good loot.