well, one thing is for sure.
no mather what, the landscapes of FFXIV put too much stress on current machines, and that without reason.
FFXIV has good graphics without doubt, but the landscapes alone shouldn't make your card hit up 80-99% (in my case that happens on both my GTX460 1gb OC 800/1600/2000), and in FFXIV they do, even without players on the screen.
it is without doubt a matter that should be taken care of regardless of temperature increasements, because if alone the landscape allready puts out so much stress, then imagine how few space there is to put in other visual effects without further straining your system.

it still makes me wonder how beautiful landscapes like in crysis 1 even on highest graphics put less stress on my machine then FFXIV's landscapes that have nothing but a few trees and random mobs in them.

a good MMO should be build up to allow for Massive action, no matter if field or dungeon, so they should prioritize their engine over alot of other things.