Similar to how the developers are implementing world scaling into mainland Azeroth on live servers (1-60), do you think the same thing can be applied to the old world of Classic WoW?
Imagine you get to level 40 on classic realms and you get your first 60% riding mount. And you play primarily in the eastern kingdoms. Imagine that you could go to Ashenvale (which was originally a level 15-25 zone) and start the quests in that zone and still get experience like you got from a level 40 quest in the badlands. It would definitely make leveling more enjoyable because you could have many other areas to quest in to get relevant experience and gear, yet the difficulty could still be exactly like vanilla.
Could world scaling work in Classic? I'm sure if it was done right, the mobs and quests would be just as challenging as they were in vanilla anyway.