Shadowform now gives the the periodic damage from your Shadow Word: Pain, Devouring Plague, and Vampiric Touch spells the ability to critically hit for 100% increased damage.It's good news for all of us who were concerned that the change to dot mechanics might have been a nerf, intended or otherwise, and it's a nice boost to mind meld, a talent that has always felt a bit underwhelming to me.
Mind Melt now also increases the periodic critical strike chance of your Vampiric Touch, Devouring Plague and Shadow Word: Pain spells by 3/6%.
But — and you can think what you like of me for this — it now feels to me like Blizzard are tying themselves up in knots trying to work this out. Why add the 100% bonus compenent to shadow form? Why not just bundle it into shadow power? And what on earth is the reason for giving dots extra chance to crit from mind meld? Set it at 4% or 6% and be done with it please.
Honestly? I preferred the old mechanic. Far more elegant a solution. But I'll get used to it :)