I would say the worst time for new players is around lvl50 until they reach lvl61 . People get used to leveling up 4-6 times a day from story quests and then suddenly you need to put way more effort just to get 1 level . It would help if quest rewards slowly decreased instead so its not so sudden . Also those levels are when most people cant continue using dropped gear and actually need to buy it , which means using gold that they have no way of earning .