Sometimes mindless grinds are fun, and Bozja allows limit testing like nothing else in the game aside from Eureka if you have the gil. Critical engagements are, unironically, some of the best fights in the game.
It's pretty hopelessly boring outside of that but that's still a higher fun-to-boredom ratio than a lot of content in the game. The only problem with it (relative to a lot of other content) was how dull the aesthetic was.
