It's SE's / FFXIV's own fault that they've had almost the exact same battle design team since ARR. They are adding new jobs every expansion and aren't adding staff to support them.
They don't even have enough designers to have a developer dedicated to each role. They only have 3.
https://forum.square-enix.com/ffxiv/...ealer-designer.
They have a manager, 3 designers, and I think they got an intern / assistant somewhere in Stormblood or Shadowbringers.
They said healers, but multiple jobs have had extremely glaring issues almost every single expansion. MNK for 5 years, Healers for 5 years, 2.0 Warrior, 3.0 Bow Mage, 5.0 RDM Terrible Mana management, the list goes on.