It depends on the fight in question and how its designed, a lot of wow fights are on the slower end due to the mechanical vomit you have to deal with from bosses and adds, thats on top of CC(crowd controlling mobs) and planning out how you'd deal with a dungeon and your overall route for the run.

While WoW does have a faster GCD, the game is actually wants you to slow down and evaluate whats around you. FFXIV on the other hand is more geared towards fast pace fights with a slower GCD so you can make snap decisions within its fast paced dungeon crawling. The general idea is there, just inverted.

That being said WoW does have some fights that are more fast paced and requires a lot of movement and fast decision making. But they're few and far inbetween.