Per your corruption statement, Rome was not built in a day. This is Somalia where the "ina adeer" mentality is inherently rooted which is an extreme form of nepotism in of itself. Even during our only historical experience with democracy in the 60's, this is the land and people whose corruption shocked even Africa observers around the world; understand the implication that post-colonial African nations were already showing extreme corruption so a form of corruption shocking even observers of that must have been extraordinary.
The form of corruption which places Somalia now as the "Most Corrupt Country on Earth" is a testament to the failure of a foundation of Somali nomadic culture which evolved in pastorlist conflict but which is now diametrically in conflict with the notions of a modern state mechnisms. This will require much transformation in Somali culture which I believe can be bridged to the modern enlightened constitutionalist idea of a nation-state by leaders who are courageous enough to help break the status quo. So yes, getting rid of people and actors who thrive in such a culture in favor of people who will fight the culture from within is a prelude to a corruption-free Somalia.
As for AMISOM; I see them as a force stabilizer. Somalia with its current clan based culture is incapable of guaranteeing a professional security force which is united in being a pillar of the state rather than a partisan actor for internal factions vying for power. AMISOM guarantees that the short-term security of the rebuilding of the Somali state is independent of internal political movements with its ever shifting and unstable loyalities.
As an example, look at this declassified CIA observation of Somalia at the night before the coup in October 21, 1969 (even then the instability and dependence of Somali security forces on clan factors is apparent):
Calling for a recall of actors fingered in perpetuating the ills of Somali corrupt culture and legitimizing the independence of the security of the Somali state is a rational and progressive stance at this point in time. What you advocate for is an emotive ethno-centrist nationalistic position which is built on subjective notions of a independent Somalia which I would say is quite naive and regressive at this point in time.
I actually call for an extended period of AMISOM sharing responsibilities of security in the Somali state much as Germany for a long time did not have total control over its army. History has shown Somalis cannot be allowed to have total control over their own security until they have established strong and independent balancing institutions.