You missed something here. When you said you dont want the game to turn into WoW, it is not WoW. Using 3rd party tools are against the rule and XIV has no official way of making those tools work other than programmers with a lot of time on their hands injecting something into the game illegaly. Yes it is illegal but there are so many ways and believe me there will always be a way to modify game clients.

WoW on the other hand is completely different, they added LUA in the game that lets devs to build addons on top of their game. Yes. They provided it, encouraged it. So you can never compare the two when it comes into addons/mods although there will always be addons and mods.