More Feedback
I admit I like the Anne Rician feel to the vampires (especially considering I am marathon reading the books right now). However, the movement does give me some serious pause. There is no way to fight one of these, even with dnd magic and heroic powers. Nothing that can move that fast, especially if it has spring attack, can be stopped by anything. the movement alone would be worth big CR increases to my mind. Perhaps the increase could be a bit slower at first, as the weaker vampires take ages before they can blur like certain character, and then after a midpoint, have a steady increase in the speed?
Where is the rules for gaining blood powers? Is that in the three missing pages? I saw no way to gain them.
You are right, there is an oblique reference to Spell Resistance, but nothing specific.
Claw damage... another issue. Dnd is pretty set in that size determines the damage value of natural attacks, all the time (with a few rare exceptions, of course). I cannot justify that a medium creature could ever do 4d10 with claws (even gagantuan dragons don't do that much with their claws). Perhaps you could allow claws, as they increase in age level, to gain special abilities (like magic weapons)? Perhaps they gain a negative energy aura, or wounding, or become keen, or whatever.
I understand the flavor limitation you are attempting to invoke with the magic limitation. I just think that there must be a better way. Not that I have come up with it yet, mind you.

Perhaps using magic items drains VP? Or worse, the longer you possess it the more soon you will need to drink.
Again, I really dig what you have done. Just some constructive criticism.