yeah, that was kind of a let down.....but all is good in vampire lord form
That kinda disapoined me, but from what I hear you can cure yourself and become a vampire lord again at the end of the main quest.
One person said no matter how many times you cure yourself you can still become a VL after, don't know if it's true or not.
So it seems it's no problem curing yourself, changing your appearance. and becoming a VL again.