Well yes. Classic was designed with the world as the main character and it was all about discovering it ... on your own or with friends and not by googling fastest way to level 60, what covenant should I pick etc. ... you had to be involved in the world.
As time went on, leveling started to feel like a chore to some people, even in new expansions, addons and features added to the game started to hack away at the exploration part and this includes new expansions too (like quest helpers ... with quest helper you can just hit max level and not remember a single thing from the journey .. less than 1% of the quests require you to actually read them.)
Slowly it ended up to what it is today ... a dungeon lobby with indicators on the map telling you where to go, you very rarely have to think for yourself.