If you where the leader of the akatsuki how would you divde the members? it has to be squads of two and explain why, pain and konan can also but put in a squad.
If I was leader, I will make one Squad. All members together and hunt 1 jinchuriki at a time. Forget all this 2 man squads, if everyone was together, they >>>Narutoverse.
i think they were divided perfectly . The artist together , the zombie duo , god and angel etc . traveling in twos made since . if they were always together it would be easy to for different nations to zero in on them