(I think the man is a true sociopath, so the answer is "no").
I think that simplifying Luthor to just being a sociopath takes away everything that makes his character interesting. Yes, he isn't always a good guy, but neither is he a straight out psychopath, like Hush. Up to the point when this story occurred, he had always been portrayed as a complicated man whose immoral actions usually centered from his self-centerness. However, I don't think this makes it impossible for him to care for others. He may not love Lena in the way most people traditionally think of love, but he does care about her, if only because she's his daughter. Even the most self-centered people care about their own possessions, and Lena is basically like one of Lex's possessions. So, I agree with you about him not being able to feel selfless love, but I still think he loves his daughter as much as he possibly can.
The whole Lex/Lois thing is bunk, though. Lex as being in love with Superman's girlfriend is a fascinating idea that could have been presented in a really interesting way. But it wasn't and as such, I'd prefer to just pretend it never really happened, beyond Luthor being attracted to Lois at one point.