I don't see how us being 60% madow negates anything. They have features that can be found in both Horners and Eastern Bantus while also being located right in the middle where you'd imagine the two groups would interact. It wouldn't be odd for a mixed group to develop in the area just like Banaadiris did would it?Ehh, they look very different from "intermediates". You do realise we are already 60 madow mixing with a bantu will make that product 70-80 madow. Many Black Americans are already 30 european on average for example
Also keep in mind Eastern Bantus are already Cushitic admixed. Kikuyus are around 30% Cushitic for example.