These two things being actually connected, because the Cimmerians were foreign to the region and pushed and destroyed many of the Daco-Thracian/Channelled Ware groups. There were basically two major surviving nests: In the North, in the mountainous regions, especially Transcarpathia and in the South, from where Psenichevo and Bosut-Basarabi emerged. But those groups in between, and this is key, didn't completely disappear, and even Bosut-Basarabi became heavily influenced by the Thraco-Cimmerian horizon. Note the difference:
- Cimmerians
- Thraco-Cimmerian horizon and its influence
The latter soon became completely mixed but was very influential for the developing cultures, especially of the Basarabi-Hallstatt sphere. So in the end, while we already know the earliest Cimmerians were different people, the Thraco-Cimmerian horizon, as a migration event and cultural horizon, spread Daco-Thracian ancestry wide and far.
Its similar to the later Thraco-Scythians and Geto-Scythians, of which we already have plenty of samples: They are usually much more Pannonian and Thracian-like respectively than anything else! And its from these mixed groups, of which some even retained Daco-Thracian languages, that there were wider spread and backflow onto the steppe. You might have noticed in papers about Carpathian "Scythians" that their ceramic is fairly conservative and regional at first. The question is just: How much of this was female transmitted, how well did the males? I'd say that E-V13 got in their former core regions heavily reduced, both by Cimmerians and Scythians, but didn't disappear. Whereas in the more Southern centres, in which these Cimmerian and Scythian influences remained primarily culturally, and there never was such a big impact, more of the regional paternal ancestry survived.
That's at least up to this point my impression, unless they had the biggest founder effects in Psenichevo-Basarabi to begin with. To explore that, we need many samples from the cultural formations in the Northern Carpathians, for the phases in which some of them at least didn't cremate. Then it can be checked probably. F�szesabony-late Otomani might prove to be interesting as well.
Thraco-Cimmerian influences spread very far and wide, deeply into Central Europe. These weren't all pure Cimmerians, especially in the later stages.