I suppose i am the weird one here then. Because an HD update of old zones, and then filling them with a few updated areas and new questlines would absolutely make me excited to go to those zones.
And sure, i have gone around pretty much everywhere in the old zones, but I still don't think this makes it markedly different from zones that exist in whatever the current expansion is.
Not to mention that unless you are the kind of player to constantly replay all the old quest zones it's quite unlikely that you have spent time in the zones to any great degree in years. And compared to spending time in a zone for actual quests, with limitations on movement and enemies that pose a baseline amount of challenge, is night and day to oneshotting boars in Elwynn.
If your argument is blatantly that a zone that has existed for four months is genuinely more exciting than an equivalent old zone, then I can't really argue against it. It's clearly a question of taste, and for my own taste I don't think there is much difference in an old down and a new one beyond the initial burst of excitement. Currently i only really enjoy the new zones more than the old ones because of Dragonriding, a difference that could be changed at any moment.
For an even more blatant example. I enjoy flying around the Green Dragon area in Ohn'ahran plains far more than I do Zaralek Caverns. And that one has only existed for 7 weeks with the coming reset.