I have a hard time believing that FFXIV has a more recent engine when everything in FFXIV can't improve beyond anything else because #limitations.
* Improved character models and character creator? #Limitations
* Better lighting, textures and other asthetic options on higher end? #Limitations
* Better QoL improvements on HUD, System and Inventory Usage? #Limitations
They have little reason to do any of this when the overall feedback is positive. "If it ain't broke, don't fix it" is the best translation on how they don't want to improve it. XI is running fine for now and a likely foreseeable future. FFXI was their most profitable title 6 years ago. XIV will likely take that spot and on both titles, the technological investments are minimal.
They likely never will make the upgrades that people asked because 1.0's "bad things". But games can be done better, faster, easier with the right tech, but that tech takes time, like any skill, to improve.
The key word is always "improve". A word that doesn't seem to be in their dictionary as of late.
