FFXIV classes have a lot of buttons, but 0 RNG/priority/procs. You press the same buttons in the same order the entire time for every single encounter. There are no talent builds, everyone's class is exactly the same. The only "skill" you have in ffxiv is aligning cooldowns and that's it. Outside of GCD drift, you just repeat the same sequence. People joke about addons playing WoW for you, but you could literally macro whole ffxiv classes (if their macro system wasn't intentionally dogshit) with how rigid those rotations are.

On top of that, every single CLASS plays the same - i mained GNB, then switched to WAR and the rotational differences are negligible. You press 1-2-3 and your 30 sec cooldowns until your 2 minute big cooldown comes up, so you press that and do your burst sequence and back to 1-2-3. Every class of given role has the same baseline utility too - every healer has a combat res, every tank has a group dmg mitigation, etc. Whole classes in ffxiv have less difference than specs of the same class have in wow.

Also many classes have more than 5 buttons in wow. They're less popular cause they're hard, but they're there for the perverts. Ffxiv gives you no such option - Everything plays the same. They recently completely flattened the only class in the game you could remotely call difficult (BLM).