It's a line Blizzard has drawn from way back when, yet suggestions or requests for classic realms continue to pop up on the forums. Let me tell you here and now... don't bother. Blizzard will eventually just lock your thread or delete it entirely simply because it's not in their best interests to provide such a service. First of all, so much development time has been invested in moving the game forward. Blizzard is also ramping up leveling time because they want players to focus on the endgame that they're developing right now. Besides, really, the game has never been more fun.