If I may be honest, I am a casual, always have been. I play mainly for the story but ... I do feel it is too easy. Coming back for the second time a month ago after years away from the game when it was MUCH more difficult, I feel leveling has gotten way too easy. I would judge that about halfway between the way it was 8 years ago when I stopped playing regularly and the way it is now would be the sweet spot. The problem with making it a faceroll up to level 75 is that people don't learn to play their class by the time they are ready for end game content. Like everything in life, learning to play your class effectively take practice and if you can just zoom to level 75 with little to no effort, you never learn what the most effective rotations are.