Despite this welcome change, I implore all Warlocks to do the quest. It is one of the best and most flavor-rich quest lines in the game, and any Warlock worth her salt will have fun keeping up the Bell, the Wheel, and the Candle. The cost of materials are trivial in the new economy, so there really shouldn't be any excuse not to do the quest now. High level friends can and should (we're Warlocks, after all) be bribed to chaperone Level 60 Warlocks with the Dire Maul Achievement.
[UPDATE: Thanks to our industrious readers, I needed to change my shorts (I'm sending you my dry cleaning bill, Augustus) when I read about this change... the coefficients to Corruption and Immolate were significantly buffed to 20%. That's just... wait, let me change my shorts again (blast you, Augustus!). Oh, and apparently Ritual of Doom is actually cool now. It no longer kills a party member, the Doom Guard lasts for 15 minutes and just disappears afterwards like a zit to Oxy afterwards. How polite. So wow, yeah. Bdew, you can split my dry cleaning bill with Augustus.]