Firstly, I do not even support these regions. I think it is the biggest waste of time and effort. Everyone will come to that realisation sooner or later.
Galmudug itself is unable to sustain itself at this moment. It shouldn't exist, so is HirShabeele.
I think, the those regions that should exist (temporarly/pending review say in 20 years time) is Puntland, SW and Jubbaland. These regions are consequential, i.e. it is fact on the ground. SW and Jubbaland are supported and guaranteed by Kenya and Ethiopia. While Puntland is a self-sustaining region.
HirShabeele and Galmudug should fold under Mogadishu. They cannot independently sustain themselves at this moment and they do not have Kenya or Ethiopia to guarantee their existence.
With regards to Sool/Sanaag, there already exists power and authority. You cannot just like jolt from the sky (jug so dhacay) claim you are going to create a region from Mogadishu. When Mogadishu leaders cannot even set their foot on the ground. How absurd.