Korean Live Letter and Job changes (Translated)

[Krysanthia]

There's not really anything they can do about that: In each and every fight in this game, you "Win" if the enemy HP reaches 0, which requires damage and nothing else.

This is technically true, but Ichorous Ire is a good example of how they can make boss fights much less focused on doing absolute max DPS and instead focus on other mechanics. Now whether or not they can make those kind of fights engaging consistently is another matter, but the possibility has certainly been proven by them.