I don't have any direct personal first-hand understanding of this, but my understanding is that the evolution of it was fairly slow to start. After about four years of initiation they started to develop real information. Now they gather information from all the stakeholders who are involved and have been issuing maritime advisories for the last two or three years. NORAD is the place where all that information is fused on behalf of not just NORAD, but everybody that's involved.
I think it has evolved into a functional, useful mission and is recognized to be so.