I think Bendis mentioned that the Illuminati are going to be explored further down the road with flashbacks and stuff. But I basically agree; that whole issue was meant to explore the drama of the Illuminati breaking up, and yet we just met them, like, a minute ago.
I like the general concept of the Illuminati even if the execution didn't go quite as good as we'd hoped 'cause, like I said, the Marvel universe needs an Illuminati; hopefully we might get, like, New Illuminati or something after Civil War.