To be fair, I kind of threw that together quickly, so I think the actual position of some jobs is absolutely something that can be discussed, or even just how far apart some jobs are from each other relative to their positions on the scale. Even looking back, I'm asking, "Is bard really that high?" I definitely feel like it is at least a tiny bit more complex than Monk, Red Mage, and Samurai, but it does look a lot higher than maybe it should be?
Black Mage is a really odd question as well, because the actual rotation is one of the most simple and straightforward rotations in the game. The challenge of Black Mage comes entirely in the need to know when you have to move ahead of time and plan your resources around anticipating mechanics, which no other job really asks for at that level.
Honestly I think it'd be fun to iron out the proper order and placement on the scale.