Ethiopia/ East African Genetics?

After reading though several studies on East African genetics pertaining to the Neolithic and pre Neolithic time-frames, I have several questions.

There are 4 basic ancient DNA samples that represent this area: KEN_Pastoralist N, KEN_Early Pastoralist N, Ethiopia4500BP (Mota), and the Sudan_Kadruka1_4000BP.

The Sudan Kadruka sample is almost identical to the Kenyan Early Pastoralist Neolithic sample, indicating the same Pastoralist population was present from Sudan ranging down to Kenya during the Early Neolithic timeframe.

Based on several studies, it seems there are the following regional components during that timeframe as well: proto-Nilotic (pre- Dinka), proto Ethio-Somali (an out of Africa population that migrated back into the Horn of Africa), and an indigenous Ethiopic population represented by Mota (?).

The Pastoralist Kenyan populations also contain a percentage of Mota plus Nilotic ancestry as well as Eurasian ancestry.

Now, in terms of chronology, can it be said that the proto-Nilotic, proto-Ethio-Somali, Mota, and Pastoralist populations were all coexisting in East Africa around roughly the same time period (pre Neolithic, as well as the Neolithic)?