More than 1 instance: less people in any instance farm their alts.

Blood quest (kill 5-15-40): if you miss the quest because you did not finish it in the time while you logged off, the quest is uncomplete in the moment you relog and counts down from relog. so its not possible to pick the quest the next day.

Chosen of Gullah: Still the buff goes randomly, sometimes 1 player get it 3 or 4 times while others get never the buff.