I am inclined to believe that Italy may well still own Libya to the present as an integral part of its territory. Not only would its oil be seen as of tremendous value, but mention by the Italians has been made about how the temporarily-settled Jewish communities helped immensely with building up Libya for future Italian settlement; while it will probably retain a pretty high Jewish population, the space and infrastructure left behind by the large number who moved to Israel will probably go on to be settled by Italians. Coupled with how low the Arab population in the interior is (as well as the likelihood of anti-Arab suppression undertaken by the Italian government, particularly so in the future given the coming Second Arab-Israeli War), I see it becoming established as a core Italian region by the present.
Abyssinia (plus Somalia) is trickier. Evidently they at least have it until the 70's (as indicated by the foreshadowing in the Balbo interviews), but they are already dealing with substantial terrorism by that point and probably no small amount of international scorn. I would lean towards it becoming independent in the times since then.