Quick question, if I have the ability to shift into vampire lord form, am I still suffering from vampirism out of that form? Like will I be able to tell I'm a vampire in normal form?

No idea as of yet, but I'm hoping it's completely different. I don't like vampires in vanilla Skyrim. Maybe, probably, it's a complete different disease.

I'd say the vampire lord Harkan definitely looks vampirish in his 'normal' form. Take that for what you will.

From what I recall reading if your not in Lord form you're not recognizable as a vampire

it is. Harkon looks really different.

Harkon is a different type of vampire if i'm not wrong (giggles) and your character might ``change`` when you get the lord form, from a normal vampire to a more powerfull being that doesn't follow the ``normal`` rules of a vampire.