Combat system is beyond saving.

[Shurrikhan]

You don't wait for 24 people to take turns, you wait for 24 people to telegraph what they want to do, and the server executes all the turns in order of agility/dexterity at once.

Which, as soon as you account for the fact that the more agile can lap others, is effectively what the GCD does now. You're just allowed oGCDs and positioning atop that.

If combat is to be saved, then gear has to matter, and it pretty much doesn't except for glamour purposes and whatever is the highest end raid at the time.

I'm struggling to think of any actually combat-focused experience that wasn't improved by capping or outright ignoring gear. Gear exists specifically as either a grind-wall for content or a difficulty slider moved via luck and/or money instead of a menu option, and generally through as haphazard of granules as possible.

Perhaps if gear-progression (too often synonymous with progression in general, imho) came through nonetheless enjoyable means other than those dependent on completing/clearing those core crafted experiences, I could see it, but otherwise it just means "Here, you finally learned how to do X. You are now free to do X a tiny bit worse while still succeeding."
That said, the last thing I want the gameplay I'm playing the game for to be barred instead by gil-grinds the moment-to-moment and overall gameplay of which has no appeal for me, such as in having to buy crafted gear repeatedly just to not "sandbag" my party while leveling. /shudder