Oh, right, I can see how it might be difficult to adapt to the regen issue and learn to stop holding back. And that probably explains why Caine killed most vampires before they reached the end of their first century: it reduces the likelihood of them learning not to fear injury. I'd sort of ignored some ramifications of the bloodbinding thing and assumed that the older vampires needed to be more powerful to control the younger ones.

About Steve and the virus, does that mean he'll probably need infusions from Tony, since he's a) the only other vampire available, and b) Erzebet's 'child' so to speak.