I didn't flesh out my level and perk strategy as well as I would have liked (I got it nailed down at level 65). I also assumed the Hard Cap was level 100. My character will still come out, I'd say, approx. 85% the way I would've liked. I'm at level 72 now (gotta get a life, huh :D), and I've mapped out my remaining perks.
Anyhoo, if there are new skills, that will allow me to level up further and pick new perks, which would be awesome. Oh, fyi, I don't like spoilers and I don't want to learn the Dawnguard story (I'm like that with most games), thus my ignorance of Dawnguard.