Please fix scaling, fights are dying so fast now

[ovIm]

Also it's squares fault that there's even a difficulty spike like that in DT because they never challenged players in the leveling process

This one here is a big one. Whenever Square introduced some sort of gate in the game, people complained about it (see - Steps of Faith). Relenting to that of course meant that any incentive to get better through the MSQ just poofed away.

That being said, the discussion about difficulty of content kinda breaks apart from what OP initially brought to light - namely that with how ilevel scales, fights lose part of their appeal. No sense of danger, and bosses die before they can do the cool thing. (I recently skipped over the DPS race in M4N and that was... off putting to say the least.)
Of course, becoming stronger is a core central theme of any MMORPG. However, the level sync system works against that notion (which is not a bad thing, mind you). Level synching could benefit from a rework at this point in time though.

[Mawlzy]

This one here is a big one. Whenever Square introduced some sort of gate in the game, people complained about it (see - Steps of Faith). Relenting to that of course meant that any incentive to get better through the MSQ just poofed away.

That being said, the discussion about difficulty of content kinda breaks apart from what OP initially brought to light - namely that with how ilevel scales, fights lose part of their appeal. No sense of danger, and bosses die before they can do the cool thing. (I recently skipped over the DPS race in M4N and that was... off putting to say the least.)
Of course, becoming stronger is a core central theme of any MMORPG. However, the level sync system works against that notion (which is not a bad thing, mind you). Level synching could benefit from a rework at this point in time though.

Is a solution to ensuring all mechanics are seen simply to increase the bosses total health?

[ovIm]

Is a solution to ensuring all mechanics are seen simply to increase the bosses total health?

Its one solution, but necessarily, an easy one - considering the HP values of every encounter would need to be recalculated with every patch that changes skill potency (time to kill is usually part of the design) - and even then, with every time the game culls low level skills, the gameplay factor of these earlier instances diminishes. Speaking strictly of "seeing mechanics", and not factoring in kill time, a solution would be to shun away from the timeline based boss encounter approach FFXIV does, and instead have things happen at specific HP thresholds. That of course could lead to skipping mechanics too, if the damage is high enough to skip to the next threshold when one mechanic happens. And it would not necessarily help with the main problem, which is that some encounters end too fast.

So really, that is a problem a game designer would have to mull over. Especially FFXIV has a lot of moving parts, where adjusting one thing can lead to undesired moments happening in another thing.