At the very least, Vanitas' features stay, because towards the end, although he is reawakened, Vanitas chooses to remain as a part of Sora, believing it more profitable for him than trying another one of MX's schemes. That keeps the golden eye, and the black hair too (both he and Xion have black hair) As for Ven, Sora bears a massive connection to him, thus the hairstyle also remains. It's a sad cost, but it's one Sora doesn't complain about.
XD I just googled Watanuki. Looks nerdy. What's the new one look like? 8D
D8 Where'd you download it?! I WANT IT!!! *Shakes lycoris like a madman*