The rework you're referring to is the rework of the Cross Class functions, not reworking how jobs in entirety work. For example, previously you had to level THM to 26 for Swiftcast, which was a mandatory class skill for healers. Now, you just need to be 32 on any of the casters or healers to unlock Swiftcast. They also removed having to level another class to 15 to unlock a job. If you want to experience how a job functions at 60+, the only option currently is Palace of the Dead, which will give you a pretty alright idea of rotations on the boss floors.