Oh yeah - I saw that bait and took it. :)
From a certain angle, I don't disagree at all - there are a lot of a problems with WoW's game-design, and they seem to be getting more severe with time. I guess Blizzard is less interested in providing a virtual world these days, and more interested in building a pretty theme park ride followed by some multiplayer instances with a lobby that looks like the inside of a bank. I guess that's driven by knowledge of what the majority of players want, but it's not what I'm looking for.
That said, the world still does it for me. It's big, internally consistent, endlessly charming (if you like that weird broad-strokes cartoony thing Blizzard has going on,) and there's always something interesting in your line of sight that you can get to and poke.
Sure you out-level areas and have no solid in-game reason to go back, but I like that. It cements those areas as real places rather than as arenas that have no purpose beyond serving my adventuring needs. The places exist on their own terms; some are too dangerous for me, some are too easy to be worth adventuring in and some are right in the Goldilocks zone. The point is, that's not relevant to them; they're indifferent to me. I come and go as my level allows, but the place -the world- remains.
And, if you get off the ride, there are plenty of out of the way placed to go see that you'd otherwise miss (a real failing of the ride is it gives the impression that it's all there is in the game, which isn't true,) In the old days these were largely limited to interesting little vignettes, with no game effect that you could find and get a kick out of. In more recent expansions, rare named creatures and hidden loot are scattered around the map pretty liberally and they've made some effort to reward hunting those things down.
It's nothing as involved as GW's map completion or POI map points, but it's fun and kind-of it's own reward. And -to be honest- given GW2 has POI icons on the map telling you where to explore, and tracked map-completion, which game is really leading your exploration by the nose? ;) /snark
(Not that I have anything at all against GW2. I never got into it as much as I'd have liked, but that was more to do with my time availability and what my friends were playing than the game itself. I did like the setting a lot, and a most of the game-play innovations were a) long-overdue in the genre and b) really interesting to me.)
Obviously, I'm not going to sell you (of all people!) on WoW, and I wouldn't try. Even if you didn't already know why you don't care for it, I don't actually think it has a great new player experience any more. That groove you talk about is too prevalent, too limiting and too ... safe. But I do think there's a very well built world in there trying to get out. It used to be more exposed than it currently is by the game, but it is in there. That's why I think that Blizzard does (or did) know how to build one. When the mood takes them.
*Edit*: Wow. Wall of text. Sorry about that!