I'm in ebonheart and i just don't like the downsides of it anymore
I am nit sure on that, but from my understand. If you get it cured you will not be able to get it again with that character. So, think about it before you rush off and do it.
For me the advantage is better than the drawback, sure you gotta feed every now and then to keep away from the drawbacks of the later vampirism ranks. But the fire weakness can be fixed with rings.