Forming the teams according to some overall ranking has a non-political overtone that I very much like. As soon as you bring in head-to-head, then you've opened yourself up to all sorts of bickerings and political solutions that may have no basis in fairness. I missed the description of what will happen in following years but, as one poster suggested, rotating teams through the divisions makes sense in the long run. Of course, there is no such thing as scheduling for the long run. :-(