The main scenario quests and class/job quests maintain a little more variety. And they help hide some of the repetition by mixing the dialog in with the quests themselves. Part of WoW's issue is that you generally only get quest text when you start a quest and when you turn it in, so the structure is a lot more exposed; you notice all you're doing is killing boars for 90 levels. FFXIV breaks its quests up into chunks, with a bit more story at the break points, so it's not so obvious.

Side quests, though, especially at quest hubs, don't have quite that much variety or quite that much sleight of hand to hide the boars. It's still a bit better than WoW, and there are some side quests that are just as good as the main scenario, but there are a good deal of side quests that are same old same old.