Why can't we have jobs with this level of depth and customization in FFXIV?

[File2ish]

FFXIV will never be FFXI because it would render FFXI obsolete. There's a reason those servers are still live...so people who enjoy complexity can play the game. FFXIV is a game for people who enjoy simplicity. It's not and will never be FFXI-2.

It amazese how many people complain "XI had this, why doesn't XIV?" and yet don't have the common sense to just go play XI. Hell the game is there to be played, seriously, go play it.

I think you mistake what's being said as "make this game XI-2" and not seeing the intended meaning. This topic is less "XI had this, why doesn't XIV?" and more "XIV has jobs with very simple mechanics, here's an example of what a future class/job could be similar to."

What's wrong with looking to SE's past works and examining ideas that worked that could be altered (probably heavily so it isn't super complex and it won't break the game) and implemented in some way into XIV:ARR (a game that is still growing in many ways).

It's unlikely the combat system will ever change, but who's to say we can't have at least one class/job work with at least some more complexity than what we already have?

And people left XI for various reasons: to find a new experience, dwindling server populations, friends quitting, unable to sink several hours a day into the game because of real life, not liking the new expansions, falling too far behind and are unwilling to catch up, etc. among a slew of others reasons. Just generalizing it into "people who enjoy complexity can play [FFXI]. FFXIV is a game for people who enjoy simplicity." just doesn't work. Hardened FFXI players certainly aren't the target audience, they never were for ARR. But it doesn't mean more complex mechanics can be implemented in some way in the future.

Expansions, updates, new jobs... There's a lot in store for this game, it's not unreasonable to expect the game to grow even slightly more complex as time goes on and new content is implemented.