Well, I'm all for world-revamp, and when I think of that concept, I mean down-to-earth stories, pre-cataclismic vibe of adeventure, lesser scope of threat, more about pure fantasy, like necromancy, magic and knights, and less about grand-scope titan/order/ultimate-threats. I think Dragonflight does a really good job, but it's still relatively to what we had in like 3 past expansions. Also, if you close your eyes and forget about the time-shenaningans in Draenor, that story was pretty down-to-earth as well. Also, aesthically, I prefer dark, unsettling forests and beautiful, autumn color palatte plains, over crystals and green lava filled zones. And once again, Dragonflight nailed it. So story- and design-wise I would love to have much more space to breathe, like classic kinda had, but...
Classic and almost everything pre-Legion is absolutely outdated for modern gameplay. I'm tempted to say that even current version of WoW is pretty much outdated. It's hard to tell what should change in that regard, but definitely WoW requires some re-imagining, or changing it's gameplay philosophy.
When it comes to story, Dragonflight create such a PERFECT opportunity at so many levels, as I already mentioned in previous post. But add green dragons to that, "renewing" Azeroth. Infinite possibilities, really