What makes a job easy = Few abilites /not having a complex rotation / Less abilities that are dependent or triggered by other abilities(inc shared cds) / shorter cds.

How complex and hard something should be -> should be tied to the difficulity of the the content...
Healers seems easy and brainded..when you do normal difficulity content -> but once you start doing savage and ultimate..
- you realize you do not want any more complex job.