they have changed blood price so that you get blood when you use it. since that didn't worked out that good they then changed quietus to recover mana. so instead of blood price > mana > abyssal drain it now is:

blood price > blood
blood > delirium (for longer blood price uptime)
blood > quietus
quietus > mana
mana > abyssal drain

and the idea of "making the jobs easier with 4.0" and removing button bloat was a succes! all hail to the blood gauge! \^^/