Are you perhaps mixing up events? "Extirpation of indigenous european haplogroups" is a phrase I'd associate with the WHG/EEF boundary. Clearly we're not talking about that. I don't think I need to point out that extirpation of EEF-associated populations didn't occur either and isn't particularly relevant since one of the main areas these weights were found was Sardinia.
The paper is also talking about a period that begins in the eastern Mediterranean around 3k BCE, moves through southern Europe, and eventually ends up in Northern Europe and Britain around ~1k BCE. It's clearly not associated with WSHs.
The paper is also talking about a period that begins in the eastern Mediterranean around 3k BCE, moves through southern Europe, and eventually ends up in Northern Europe and Britain around ~1k BCE. It's clearly not associated with WSHs.