One of the aspects that soured me on WoW post TBC (although even prior to WotLK this was already somewhat of a trend in the game, just much slower) was the decrease in challenge in the ‘normal’ game, with only special ‘hard mode’ versions of the same content being tuned to really push you. Especially in vanilla, there was plenty of content that would test you, even during the leveling game (elite quests, certain dungeons). This removal never made sense to me, because WoW never forced you to beat that content, and outside of max-level stuff, you always had the option to go back later if you wanted to see something.
FFXIV is a lot of fun in part because the content challenge doesn’t insult you with how trivial it is in spots. Yes, most random quests you pick up ARE very easy kill five of this or collect five of that tasks, but the dungeons you run as you level require some level of competence, and the main quest line (that isn’t optional) and class quests have some fairly challenging fights you must solo due to the Duty system (basically a private instance).
It’s these Duties that my wife struggles with at times (and sometimes I do as well), mainly because we always do them right as soon as they become available, and because our gear is limited to what we get from questing and running the dungeons once (no AH or crafting), and I think this challenge is a great thing overall. The smart thing about this design is you CAN come back to the Duty later when you are a bit stronger, but even then you can’t completely overpower it as the Duty will level-sync you should you be more than four levels above it (though four levels is a fairly significant amount of power).
The only consistent complain I’ve seen about FFXIV is that the main story is required to progress in the game, but I think the real complain is the challenge, because WoW has trained newer MMO players to not expect any. And again, this isn’t even older WoW, where if you wanted to see the main villain of the expansion (Illidan) you had to be a top-tier raider; this is simply required content you can’t completely faceroll to progress past, and yet a minority still complain.
As Rohan wrote, this overall helps FFXIV, as it weeds out the worst of the ‘WoW-kiddies’, meaning you don’t get randomly grouped with them during a dungeon, or have them running around spamming local chat, tagging mobs, and generally being WoW players. I’m glad SquareEnix ‘doubled down’ on this design by making the expansion content gated behind completing the original content, and hopefully they don’t make the mistake Blizzard made with WoW starting with WotLK.