About your point on SNM the movement has tried numerous times to attract large segments of Somali communities with establishing bases in southeast of Ethiopia to conduct border raids against the kacaan regime but that has failed as the regime also played the clan cards and heavily encouraged of bringing back old tribal rivalry between the community which is why in late 80s SNM completely allowed the newly formed Hawiye group USC to take on the responsibility to face the regime in central and south pf Somalia while they will just focus on the north.No because Mogadishu technically isn't really a capital. None of these clans where formally under a single kingdom and have there own centers or capitals. You literally have to dominate all the other groups like what isaaq did in the North to orginally form somaliland. I think personally that the isaaqs where retarded for stopping in what they call somaliand because they where in the best position to dominate all the clans at the start of the civil war when they secured somaliland. Them walking onto the capital and controlling each area on there way south would have been the equivalent of what the tutsis did.
Plus since they are not of Mogadishu it would have lead to none of the other clans rising up since it would lead to everyone turning on what ever group rose up to them because the clans in and around the southern region have more beef between each other and would rather see a third party in power as opposed to any of there other rivals. That would have worked if we wanted qabil to work alongside a stable somalia.
Regardless tho in this scenario a good leader with his people's interest in mind would be needed otherwise another civil war/coup would break out at some point.
Another option is absolute domination from one clan that completely breaks down the other clans and relocates and spread all the other clans thin. While facing out the whole clan system. That's kind of hard now because people are more educated now tho.
This "democracy" we have now simply won't work