Ciels route is as good as Akiha's, if not better. Only reason people say skip it is because of Ciel hate. I don't like Ciel, but her route was really good, it was Arc - fluff bore + mind games + action.
Also try playing Hisui route before Akiha. Kohaku's before Akiha is the only one with conflicts, for you'll probably end up hating Akiha with the same or greater passion & reason that everyone hates Ciel.