PvE wise It's fun indeed and I don't find it hard at all. I got dps castsequences bind on Mouse-wheel-up, priest healing on mouse wheel down, and need to care just about moving and dispelling. I've leveled through all classic instances up to Scholo now and wiped just twice on hard bosses so far. It's not just about the pure dps, but also about the tools and buffs some classes bring to the team. Only disadvantages are multiple class quests and class trainers in various cities, but it can be cowered by warlock summons.