hi...
i am playing this game on my PC, really really took my time on this one (over 300 hours!)!
just reached level 81, all skills are at 100 and still got 13 perks to spend.
just wanted to ask if dawnguard provides a higher level cap, because i read some reviews that said that you are getting a new skill tree but nothing on character's max level.
so.... should i save the perks for the new skill or use them now? because i dont really know if i'm getting more of them....

Go ahead and use 'em. The new perks for the new perk trees (Vampire Lord and Werewolf) are unlocked as you use either of those forms.

sorry....not sure i understood what you said...
so you do get new perk points? because you only get them by leveling your character...

vampire and fleabag perk trees work differently, you get perk points by "feeding" on npcs, it doesn't contribute to your characters level outside those forms.

Vamp lord and werewolf perk points are separate from your regular perk points, you only see them in VL or wolf form.

You are free to spend your 15 points on whatever you want, they have no use in the vamp/wolf trees.