I think we have to consider how Siad Barre came to power. It was becuase the 'policitiancs' were corrupt and had no idea what they were doing. There were more political parties than there were people lol

. This was made so much earier for siad becuase there were no viable alternatives or people with support bases that could oppose him.
The current political environment is very different. There are existing political factions, some with significant power. The people are not united but fragmented. There is Alshabaab, ASWJ, Puntland and Somaliland. For one person to take control of all these territories he would need significant support, resources and there would be huge battles. Let's remember that all this is not in a vacuum either, there is ethiopia and of course the U.S as well as other regional players who each have their interests, objectives and plans.
So should not be what is likely or posible?