I don't know why people keep cherrypicking very specific examples from WoW. The vast majority of WoW's dungeons are just as linear as FFXIV's, Blizzard has just gotten better at hiding how straightforward they are (like in Ilitsa's photo). About the only thing you have a say in is what order you kill the bosses, but since in most cases you're required to kill all of the bosses anyway, it doesn't really matter.

We also need to stop trying to compare MMORPGs to single-player console RPGs because that's an extreme apples/oranges scenario for a number of reasons that have already been mentioned in this thread.