I don't know if it's me being a ^&*( but I leveled my MCH to 60 and I am very disappointed, and when I look back at my level 50 jobs and KNOWING how much of a Eastern grind it will take to level it just deflates any urge to play.
In my opinion when you level new jobs there should be new quests for those jobs to do to make leveling easier. but alas I may be acting as if I am an infant.