If I understand this correctly, they should not get so excited so quickly. Improved fit between molecular and phenotypic data will another beast liberals are afraid to name: Racism.
You see, the whole race-and-genetics argument fell apart the finer the structure you looked at. Well meaning bio-anthropologists started with attempting refined systems of racial classification. As the number of measures and categories grew, the ability to maintain cleanly separated racial categories became harder and harder to maintain. This contributed to debunking notions of IQ and race.
The take home message was that racial categories were superficial, and told you nothing biologically - other than some basic examples of environmental adaptation.
Now, by being able to establish a smooth continuum of significance from the molecular to the phenotypic, there will be a return to “racial analysis.” Let the fireworks begin.
"Physical, mental, and moral peculiarities go with blood and not with language. In the United States the negroes have spoken English for generations; but no one on that ground would call them Englishmen, or expect them to differ physically, mentally, or morally from other negroes." [Erik Trinkaus, Pat Shipman, The Neandertals pp 46-47]