Bronze Age Sicilian vs modern-day Sicilians

This is the first in a series of quick and simple posts focusing on genetic shifts across Eurasia since the Bronze Age. Any thoughts about what we’re seeing in these Global25/nMonte models and Principal Component Analysis (PCA) below? Feel free to let me know in the comments.
By the way, the Bronze Age Sicilian, from a “Beaker” burial site at Partanna, western Sicily, and dated to 2500–1900 BCE, is from the Olalde et al. 2018 dataset (see here). The relevant Global 25 coordinates are available at the usual place here.

[1] distance%=5.3559 / distance=0.053559
Beaker_Sicily:I4930
Barcin_N 82.15
Yamnaya_Samara 8.8
Iran_N 6.9
WHG 2.15
[1] distance%=2.6726 / distance=0.026726
Sicilian_East
Barcin_N 50.25
Yamnaya_Samara 25.85
Levant_N 13.75
Iran_N 8.85
WHG 0.75
Yoruba 0.55
[1] distance%=2.6143 / distance=0.026143
Sicilian_West
Barcin_N 46.1
Yamnaya_Samara 24.65
Levant_N 15.6
Iran_N 8.8
WHG 4
Yoruba 0.85

Update 26/02/208: Thanks for the comments. I’ve tweaked the models by adding plausibly more proximate ancient and modern-day reference populations, including Peloponnese Neolithic farmers (Peloponnese_N), Kura-Araxes (Armenia_EBA) and Moroccans. Interestingly, the proportion of Yamnaya-related ancestry in the modern-day Sicilians dropped significantly, while it disappeared altogether in the Beaker Sicily individual. Hmm.

[1] distance%=5.0349 / distance=0.050349
Beaker_Sicily:I4930
Peloponnese_N 60.55
Peloponnese_N_outlier:I3920 17.6
Armenia_EBA 15.3
WHG 6.25
Moroccan 0.3
[1] distance%=2.3039 / distance=0.023039
Sicilian_East
Peloponnese_N_outlier:I3920 47.9
Yamnaya_Samara 17.8
Armenia_EBA 9.8
Levant_N 8.25
Barcin_N 6.55
Moroccan 6.4
WHG 3.3
[1] distance%=2.1998 / distance=0.021998
Sicilian_West
Peloponnese_N_outlier:I3920 52.9
Yamnaya_Samara 17.05
Moroccan 8.55
Levant_N 8.25
Armenia_EBA 7
WHG 6.25

See also…
On the origin of steppe ancestry in Beaker people (work in progress)

Source