Many Hawiye that are pro Somaliland secession also believe that koonfur would remain a single state after secession. It won't.
Most people in Puntland are pro union, no PIM or huuhaa will ever change that. Granting Somaliland secession is the only thing that would immediately make most people in PL pro secession, resulting in the break up of Somalia.
There is no world in which Mogadishu gives 60,000 sq km of Harti land to Isaaq and Puntland stays in Somalia. And if Puntland leaves, JL will follow suit. The D&M may try to leave at that point, leading to a kind of Bosnia-style war where Hawiye try to grab northern Lower Shabelle.
It would be a dream come true for Ethiopia and Kenya, who would rush to recognize the break away states.