The visit to Roarke's family in Ireland at the start was lovely, as was the fact that Eve thinks of having a party to help an old, grieving friend healing from the loss of his love. Roarke helps Eve more than ever, at home and at the police headquarters - the Chief doesn't seem to have anything against that, I wonder how realistic that is.
The two murderers are known very early on, the trick is to connect the crimes to them. I get the feeling that Eve no longer much feels with the victims, though. She does feel frustrated that more people will likely die while she tries to tie the murderers to their crime and she gladly becomes bait once again, but she just doesn't seem to feel it as much as she used to. Maybe that actually is a coping mechanism for her.
I really think that the author should start dialling down the crimes and keep increasing the friend and family interactions, they are what keep this series interesting anyway, even after 31 instalments.