the quests should take you a few minutes.
Go around the map enter all houses I guess.
Buy stuff they are all cosmetic and don't actualy do anything cool.
You can always pk I mean if you like mashing a single button for hours while chassing noobs.
You can tower in a guild well until that tower gets closed like 3 already have.
You can always spar if your laggy enough

Sure tons of stuff to do on classic!