As for North Rhine and Westphalia there was also a tribal division as Westphalians are Saxons and people from the North Rhine are Franks.
As for Baden-Württemberg it was a little surprise for me to see that there was no significant genetic difference even between North Baden and Upper Swabia, which are at the opposite ends of Baden-Württemberg. It was a bit of a pity to merge three regions with valuable separate data, but it was all the same so it seemed questionable to present them as three regions. On the other hand, now, with just one average for Baden-Württemberg, the data seem more coarse grained than it is.