Whoa. D&D finally has rules for playing actual vampires--not half-vampires, quasi-vampires, or wannabe-vampires--that don't gimp your character beyond all reason, and produce a character who really feels like a vampire. I approve.
(And I strongly approve of the "burns in sunlight" effect. I was afraid they'd wuss out on that. I think it could stand to be a little nastier, in fact--dazed instead of weakened, say, so that it not only fries you but makes it harder to escape--but this will do.)
On a related topic, I really, really want to see this new warlock build.