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. Hell, all this won't matter if the DLC doesn't get released for my console - the ever-so problematic PS3! Message to Todd Howard @ Bethesda: Us PS3ers better have a glitch-free Dawnguard. Since we have to wait so long for it to come out, you should consider cutting the price in half when released.