Recycling all the old bosses (Onyxia, Nefarian, Ragnaros,...), messing up my personal favourite leveling zones (Barrens, Tanaris,...) and a weak final raid which was overall just disappointing. First Boss was a joke, Hagara was settled in a recycled boss room, Ultraxion was a nightmare as feral druid, gunship fights are always terrible, spine is not even a real boss and fighting a tentacle dragon is just plain stupid in my opinion.