3.0 gameplay battle job design was pretty terrible imho. You can make things more complex and higher skill-cap, but you still have to make it fun to play. I would not mind a complete carte blanche and redesign of every job from the ground up in 4.0.

They made the most popular DD job in 2.0, Bard, into the least popular job in 3.0. So many constant complaints about unfun gameplay design. Many friends that used to love Bard dislike the new gameplay.