imo good game design is the game is easy to pick up, hard to master. Playing a character job/ gearing up that character/job should be the easy parts.

The hard parts or the challenge should be from the content itself Monk is a good example, it would have been great to have a more straightforward job, but as it is. Not a lot of people master the job. If you say have ADD you can mess up on where you have to stand during what attack, and each set of levels change the pattern. Which again can be hard to grasp for some, so those who do enjoy hand 2 hand type jobs/weapons may not be able to play monk. I know my g/f had a hard time with MNK that re re roll her character 5 times to try and learn it from the ground up.

And monk was her main job in ff11 and ff1.0.

imo there is no such thing as dumbing a job down, there is such thing as dumbing down content.