Out of Africa or Out from Eurasia?

TOOLS. New archaeological and geological evidence from Dmanisi (Republic of Georgia) pushed back the fossil occupation of that site around 1.85 mya. As the authors suggest: "These discoveries show that the southern Caucasus was occupied repeatedly before Dmanisi's fossil assemblage accumulated, strengthening the probability that this was part of a core area for the colonization of Eurasia". Moreover (and more provocative) in the final discussion Ferring and colleagues pointed out that: "The case for a possible Eurasian origin of Homo erectus is increasingly supported by chronometric and biogeographic evidence" So, if erectus did not emerged in Africa (as we were suspecting in the last decades), we should continue looking for a more primitive ancestor (Homo habilis or Australopithecus habilis?) that left Africa before the origin of the erectine population. And this opens more discussion (as always).....Which is the ancestral population leading the lineage to modern humans?: a) the habilines from Africa?; b) the erectines from Eurasia?; c) an erectine population that migrated into Africa (from Eurasia)? d).......?
New findings are great and necessary but they add more complexity to our lineage evolution.