Blizzard just can't seem to help themselves at times. I'm assuming it was hotfixed at some stage of development because it was too good. And rather than adjust the ICD, they took a stick to it with this clumsy no-proc-from-dots nonsense.
So we just don't get a starter (and cheap) weapon enchant, nice one Blizzard.
It's up there with the AoE changes, where Mind Sear is now a DPS loss unless you've pulled every mob in the instance at once (and probably even then), yet shammys and hunters can still do 100k+ mindless AoE on just 4 mobs... We're frantically dotting everything up and sniping SW:D's; breaking a sweat for lackluster results.
Where rather than taking an elegant solution, like increasing Mind Sear's effectiveness if the target has SW:Pain on it or something, they just nerf it to uselessness and leave the player to languish.
Why Blizzard? Why do you not learn from previous expansions' mistakes?
[Forgive the rant. It's just frustrating to go through exactly the same crap at the start of _every_ expansion.]