Q u o t e:
It's now only 4% chance to daze the target. Why would they do this, it's been worthless for so long so they make it 2 points and now with it at 4% it will never proc.

We've looked into this and verified that the talent calculator is incorrect. Aftermath is now only a two-point talent down from a five-point talent, however the talent is actually providing a 5/10% chance to daze a target off of destruction spells, not 2/4%.

This means for two points spent in Aftermath a Warlock in Wrath of the Lich King will receive the same benefit as is received for spending five talent points in Aftermath in the current game.

We'll be making the appropriate updates to the talent calculator shortly. Thank you all for your feedback.