I honestly don't think there can be any national unitary progress without some form of reconciliation.
This is used by every single group in Somalia to milk the donors for aid, it's a clandestine scheme that has been used for decades, it has no track record of ever working anywhere in this world.
The problem is that there wasn't just inter qabiil wars but also internal sub-sub-clan conflicts all over Somalia, a whole new generation was born that make up 70% of the population whom never partook in any of this, much of the participants have mostly died with few leaders surviving.
You want to empower this generation whom have no knowledge of the parasite generation before, a reconciliation conference will do the opposite and hand the power back to a very small minority of whom are mostly dead and won't agree on anything.
Do you honestly believe that Puntland and Somaliland are willing to accept a Southern-based army (read Hawiye majority), when there is pent-up anger from decades of conflict and propaganda?
There is no need for this both have standing armies, these simply get incorporated in a national army structure with a floating leadership much like the China model.
But this requires nationalistic leaders as well as justice the people can get behind, hence why you see the bulk of people from south to north support Farmaajo despite not being of the same clan.
Properties have to be returned, warlords must be prosecuted, and there must a national recognition of the events of the last few decades (a la Germany recognising their role in WWII). This must be done across the whole of the horn regardless of clan-ties (every clan has some guilt) or you can kiss unity goodbye.
Talk about cart before the horse.
This is useless endeavour for many reasons one of them I discussed above in regards to empowering the same parasite minority generation, your also assuming those same parasite groups would actually agree to something which they never have even amongst themselves.
The warlord prosecution which I support you will run into issues (either all or none) the properties you will run into an even more complex issues.
You will have for e.g. the looter (post civil-war), the booli qaran looter (kacaan gave it to them taken from others) whom is the claimant now and the native (whom the land was taken from, but has no documents as this didn't exist back then whom only has witnesses)
The post 90's dude that moved into the empty property would have sold the property off to a person whom invested in it after it was destroyed (through either civil war, Ethiopian war, Kacaan war) let's make the assumption you are the claimant here (land/property given to you by the Kacaan whom you bought it off) and I bought it off a post 90' dude that moved into that empty house people fled from whom presented me his assumed ownership documents he had ratified by a new administration and I bought it off him and made subsequent big investments thereafter through all the wars.
You present the Kacaan document, I present mine & investments, you argue mine is null and void and I do the same arguing the well known "booli qaran" thefts by the Kacaan, an Islamic court then needs to bring forth witnesses whom the Kacaan government acquired the land from (those people would be long dead and hence their family need to be sought) if these people are found you will argue it's null/void and I will argue that before the Kacaan your people didn't live in Xamar
Do you see the problems here? and the same will need to be applied outside of Mogadishu, people simply moved into empty houses and claimed it as theirs as the residence fled never to return, the same situation up and down the country, the Kacaan moved massive OG population in Isaaq territories which they were removed from after the civil war. (same booli qaran example will be cited in Xamar).
Do you see the pandora box you have just opened by this ? Just solving 1 case of this is so complex, takes so much time and money, it's not even worth going there and this it's best to leave these kind of Judgements to Allah in the hereafter, you gain far more then if you were wronged as opposed to if justice was given to you here.