I don't feel the show is empty emotionally. As Lucious said in this episode, the Lyons are, and will always be, a family. A dysfunctional family, certainly, but a family nonetheless. The characters are growing, including Lucious.
Last season Lucious refused to deal with Jamal, now he's willing to collaborate with him as a musician, which is about as high a compliment as one can receive from Lucious. Cookie & Hakeem are another Lyon duo experiencing significant growth. Last season, they could barely be in the same room without snapping at each other. Now they're working together as business partners and learning how to trust each other's intuition. Last season Andre had no use for Cookie, now he visits her to confide about Rhonda's impending pregnancy. Though Hakeem upstaged Jamal & Lucious at Leviticus, they showed a grudging respect for his talent & despite feeling personally betrayed by Cookie, Jamal sought her out as the producer for his next album.
No, the characters are not the same as they were in Season One, nor should they be. They're evolving, and they're the better for it.