I think this episode has two objectives: Reese's custody and Susan/Carter. Although there another interesting stories, like Weaver and her awkward ask for a date, we all know how that ends up. We also saw Corday in a difficult situation. And we find out who Nicole really is and how Kovac deals with it, with Abby somehow in the middle of it.
In this episode you really fear for Benton loosing Reese and everything makes you think he won't have the custody, specially for his "Why don't you ask me that?" scene.
I think somehow, when you think of this episode, it leaves you with the feeling that Susan and Carter make a really nice, fun couple and that it would be good for them to be together.
This is a ER episode, not at all boring nor repetitive.