I don't really like the ending since Arcueid died, and never returned again. Ciel is gone too. Why all the characters dissapearing each other.
Then at the rooftop scene, Shiki and Satsuki. When Inui just at the rooftop door, he saw Satsuki was crying. I think, Satsuki had expressed her true feeling to Shiki, but Shiki rejected her. Man... I like Shiki X Satsuki couple. But they made it this way, because i think Shiki can't forget Arcueid.