I wouldn't mind graphical mods but I rly think they shouldn't allow gameplay mods.
WoW is a complete nightmare because of it and the fights in FFXIV already do a great job at making it not necessary while in WoW the fights are built around having mods.
I want my game to be clean and not a cluttered mess with loud noises going off in the background constantly etc.

I think that visual mods would be great tho there's probably a lot of people who would love to sit down and solve some issues present in the game for the devs especially with stuff like clipping issues and head gear not working etc.