As promised I'm releasing individual, intra-population data for my Dual Core run. It is remarkably uniform within each population, and clines within them are smooth and can be explained easily. This may not be the best solution ADMIXTURE can provide, but I remain convinced it's the most informative so far for Neolithic relationships.
In Italy it appears the Nile River wave is loosing steam?, perhaps as it absorbs more and more Mesopotamian elements, perhaps also concurrently as Mesopotamians begin to learn new techniques, adopt new seeds and ways more readily, and absorb other capabilities in less dramatic ways? Second Neolithic waves would have higher drag in the model, since they're expanding against already Neolithic, even if less advanced, people.
"Forager A", or whatever the "San" component is (can't think of any other explanation for it but I'd welcome suggestions) is much more homogeneous in populations to the North. I'll publish more populations next and then the spreadsheet with all of them.