Sorry to be the one to tell you this but the Battle Job design team consists of 4 people:
A Supervisor
2 Designers
An Intern (possibly at the Junior Designer level by now)
The fact that the jobs are in the mess of a state they're in right now is a direct result of having so many jobs with so little design thought process.
It really seems like DPS are the priority and tanks and healers are the afterthought designed right before the expansion rolls out.
Why I think that?
Improved Unleash existing.
Medica 2 being a stronger single target heal than Cure 2.
The fact they couldn't do basic math and Aero 2 (lvl 42) had a higher total potency than Dia (72).
Energy Drain being removed and SCH's not compensated with an Aetherflow dump in Shadowbringer.
A myriad of other issues too long to keep going.
Hell, we know why the healers are so bad.
Yoshi removed the healer QA tester because they "got too good".