Firstly, I think it is a good thing WoW is doing that (even though this is not related to FFXIV). Because not everyone likes a GCD that fast. The GCD being like that in some other MMORPGs just led to me button mashing tbh. And yes, that worked.

Secondly, I agree that there should be a choice between a simple rotation and a challenging rotation, because there are clearly two types of players: those who just want an easy mode and those who play for the challenge.

There is an opportunity for them to do that if they go ahead with the sorts of ideas they discussed in the media tour - skill trees, talents and ability points. They said they already decided what they are going to do but won't reveal it yet.