Name one other MMO where swapping gear causes your character to blink and shed everyone's targeting of them. This would completely destroy people in PVP, something that FFXI hasn't been able to expand on due to forced gear locking. I am not the biggest MMO player but 1-2 second full character blink only still exists in FFXI unless I am mistaken. Personally, I love the game as it is and just have fun with content as it is added, and would prefer things the way they are.
However a lot of DD and Tanks decide to blame players for the oversight or limits of the Development Team. It is not XWhite Mages fault you blink and people miss target on you, it's the coders who never went back and fixed a massive hole in battle mechanics. What White Mage has 4 pallettes dedicated to just casting Cure 5 and Cure 6? How is this efficient? How do you quickly sort through 40 macros looking for one that is not named, only numbered?
Implementing this system would allow for gear swaps during Ballista, alleviate issues with player targeting, and overall really iron out a long standing issue in this game.
As you can see, it causes a lot of misguided arguements.