Blood magic is unlikely because we've shifted it from a power boost to really being the key to a lot of nasty stuff we aren't interested in having heroes do,"

I think it can be ethically neutral if you only use your own blood, but after seeing it used as a required part of mind control and demon binding in [Dragon Age 2] and [Dragon Age Inquisition], it's just not a road we want the hero to walk right now," Weekes continues, "which is a shame, because 'use your health to cast more spells' is a fun gameplay twist for folks who like that kind of risk/reward play style. We might find other ways to get that. Just not blood magic for the hero for now."
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I think it can be ethically neutral if you only use your own blood, but after seeing it used as a required part of mind control and demon binding in [Dragon Age 2] and [Dragon Age Inquisition], it's just not a road we want the hero to walk right now," Weekes continues, "which is a shame, because 'use your health to cast more spells' is a fun gameplay twist for folks who like that kind of risk/reward play style. We might find other ways to get that. Just not blood magic for the hero for now."

Dragon Age: The Veilguard skips fan-favorite Blood Mage class specialization because its "nasty" parts aren't where BioWare "want the hero to walk"
The RPG's lead writer says blood magic is a little too evil this time around