Hell!
I keep on:
...relatively a bit longer and narrower. Whatever the differences between groups I mentioned above, I doubt Bronze Ages people of N-Germany would have kept the almost pure type of only 'danubian' element. CWC were for the most 'corded' types in Germany more than in other places. BB were become a mix but still shewed a lot of planoccipital 'dinaric' types in their mix. In Unetice it seems they mixed with more 'corded mix' types, with surely some input of 'danubian' elements. IMO nordic BA people were already the mix 'corded'-'danubian' of Coon, with surrounding pops not plainly amalgamated as mixes of diverse 'mediterraneans' (rather atlantic) + 'cromagno-brünnoids' (HG's) as Long-Barrows megalithers + ex-fishers can have produced and an input of brachycephals where the famous BB's mix (lot of 'dianrics') found more rough brachy types there since TRBK. All admixtures, but with sometimes very different proportions according to places and cultures. the high skulled little 'danubian' type as a phenotype is not a Coon's dream. I recognize its input very well in nevertheless rather brachycephallic pops like today Czechs.
In short: the N-Europe BA was a mix where the typical ones shewed rather a Coon labelled 'nordic' mix of 'corded' and 'danubians' (LBK inheritage?) which seems having taken place during the Unetice osmosis, where the formerly important BB element had lost weight by time.
Culturally, archeology found Unetice was heterogneous (burying, settlements ...), at least at its beginning, anthropologically, heterogenous too, spite cultural and anthropologic and genetic differences don't coincide in details.
The first heterogeneity was pre-genesis. But post-genesis this culture influenced other surrunding cultures (like first Tumuli) where the basic population did not change too much as opposed to culture.
&: the fact all pops did not completely mix since their first meetings is that the several dominant dolicho types of elites alterned in same places according to time (and culture): the IA Danish people were closer to the Celtic dolicho elites element (what? Cimbri/Teutons-like fellows?) than to CWC or LBK people that precded them but in Hallsttatt/La Tène times the Celtic elites shewed an roughly 25% input of dolicho types closer to CWC ones (what is maybe rather a new input from Steppes direction than a CWC come back). Metrics and typology can show nuances auDNA cannot show so precisely: effect of time scale?)