I just read the article in gi and they were vague on a point or I'm just to tired, will the perks for the vampire/werewolf be attainable if your character is level 81?

Yes. you get the perks for the vampire tree by feeding.

Ok good that's a relief! Thanks

No sign of being able to reassign perks then?
Luckily I've stored 15 or so, but I have a few I'd like to reassign

I started over and I'm going to just save all my perks