Has to do partially with DA:V Revised. I had always felt that, considering how they re-did Necromancy in 3rd ed., Mortis should have been updated to reflect better as a proto-discipline for the Giovanni's art. But on some gaming forum I read (can't remember if it was WW or another), there was quite a bit of complaint that: "Sheesh, does *every* Clan have Blood Magic now? Kinda makes the Tremere less special. Next we'll see that a Toreador path has been discovered." They were referring, initially, to the updated Mortis.
I have my own thoughts on this, but I was wondering what others opinions might be (either on the revised Mortis, or the prevalence of 'Blood Magic,' or both).