Why do we still have enmity?

[Reynhart]

As far as Tanking goes, it has never been interesting. It's either something you completely ignore (As it is just passively applied in copious amounts), or something you spend every single second spamming out.

Problem is, when a mechanic is not interesting, removing it is not automatically the best solution, because people will only complain about something else not being interesting, until you strip your game of everything.

On the other hand, you could tweak the mechanic to make it interesting. And this game is just full of those.
Main stats are boring because each job only focuses on one of them, that is automatically granted by gear anyway, you could fuse all of them (except Vit) into "Power" and every job would work the same. Change them so that jobs would benefit from more than one.

Substats are boring because the only thing they do in the end is increasing your DPS, so that you could literally remove them and adjust the attack power on each item to reach the same results (Except maybe some very specific sweet spot on speed). Give them a different effect so that specific builds work better on different target. What comes to mind is armored ennemies and a critical hit that could ignore defense (Like in Dragon Quest), nimble ennemies that would require a different value of accuracy (Back when it existed), speed that would actually affect all your CD and also your movement speed, useful for fights that require lots of movement, etc...

Materia melding is boring because it also only affect your DPS in the end. Make more of them so that you could actually create builds like you did in FFVII. We're afraid of button bloat ? Why not have "All" materia that would transform your skills into AoE instead of doubling down everything. Why not have "Counter" materia ? Why not have "Ressources+" materia to build your gauge faster ?

And yes, enmity right now is boring because it requires no thought process and doesn't change anything gameplaywise.