Honestly I wish Jobs and Classes were separated from each other in levels themselves. As in Leveling THM to 30, then CNJ to 15 to unlock BLM. But BLM itself starts off at lvl1 and as you progress through the levels you get a return on THM and CNJ skills standard to those levels, at a maximum of wherever they left off. So that in essence, though BLM is a Job that has to have conjurer as a sub class starter, you only get a taste of those skills in the end and BLM is a more focused form of THM, so you get a stronger suite of skills based on THMs background for offensive elemental fury.

It would be a nod back to how XI operated (yes I know this isnt XI, no I am not harking on how I wish XIV was more like XI, etc.) You level WAR to 30 to unlock PLD, but PLD starts at ground zero and you work your way back up, using war as a sub class. Eventually having to return to WAR to level it up further in order for it to remain a viable sub for PLD as it goes past 60. Oh the days of getting in a party with a lvl75 pld and a 30 war..how I don't miss thee.

Ultimately it would solve the issue people are having with the fact that if you level the class to fifty, you have that job to fifty at the same time. Then you go back and play with skills to better understand what you have and how to use them most effectively.

That way, if you did have all your classes and jobs at their max level and then the classes branch out again in some fashion, you would start that new job at a lvl1 level and work your way back up, learning how that job works from the ground up.

Of course what I think doesn't matter because the system is already in place and I really don't see them going back and rewriting the entire system like that. They -could- do it post-50 though. Where everything stops being simultaneous at level 50 and from 51 and up its exactly like that, where every class and job are individualized in their experience gain.