I reached 60 some months before Burning Crusade so while it's vague, I recall somewhat the late Vanilla raiding scene and damn well to the BC scene.
And people are in for a nasty surprise if ''Classic'' is emulated with ''Classic'' economy, with highlights such as....
1)No daily quests whatsoever
2)Compared to BC and up , a sufficient (barely) number of quests to reach 60, but not to get a few thousands easy gold (remember walking to the Scarlet Monastery because you had no cash for mounts ?)
Combined to...
1)Much higher raid consumable intake (such as a flask and potion every attempt and, which was ghastly for my arcane mage, need to chug mana pots as a caster....dozens of them per night. If your raid leader ask for the only food buff available in the time, the dirge kicking chimaera chops, leave the raid as this recipe require AQ 20 raiding...)
2)No double specs
3)The ultimate fun experience, at least on par with ''North Korean laogai'' : elemental resistance armor for everyone in the raid !
Here is a summarized highlight that I recall, for getting the ''flamecore robe'' (pattern sold by a dude in a dungeon that took three four hours, but that's trivial)
-Getting 2 boss drops from Molten Core (to craft the robe...that was required to enter in the molten core. People were not helping much newcomers in 2005, they are not going to help much now...They are BOEs)
-Getting 10 cloths with something really ''hot'' from Vanilla and BC, you can make once every 92 hours. Hint : cost a lot
-Getting 3 other boss drops (BOEs)
-Getting 6 yet another boss drops, but that one you can also go farm elemental in Ungoro for 24 hours (0.5% drop rate) (BOE)
-Getting 4 silks that drop yet another raid and/or insanely low drop rates. (BOE)
And you ''need'' two other crafted pieces, plus two or three BOE ones. All of this to be either collected yourself or bought while it's valuable, at the AH, without the daily quests...