3) The autosomal data and mitochondrial haplogroups are completely in line with that of previous studies. The only odd piece of data in my eyes is the Iron Age Pre-Scythian sample (IR1), which has typically Siberia Y-DNA (N) and mtDNA (G2a1), but fits right in the middle of modern Armenians autosomally. It is only moderatly strange, since modern Armenians do have 0.5% of Y-haplogroup N, as well as a few percent's of Siberian mtDNA and autosomes. What it means is that this Siberian gene flow into Armenia is probably older than 1000 BCE, or even 1500 BCE, since it takes at least a few centuries for Siberian genomes to get completely diluted and look completely like modern Armenians. I am not a specialist of Armenian history, but I cannot think of any migration from Russia to Armenia around this period. Even before that there was only incursions from the Steppes into the Caucasus during the Yamna and Catacomb periods.
In this case the sample is from Hungary, so that prompts the question: how did an Armenian-looking genome with Siberian Y-DNA and mtDNA end up in Hungary c. 900 BCE ? Did it actually come directly from the Caucasus region ? Through which migration ? If we had only the Y-DNA and mtDNA we could presume that this was a direct migration from the Ural region to Hungary, which happened many times in practically all periods of prehistory. But since the autosomal DNA is not Siberian at all, nor eastern/central European, but South Caucasian, it's a real mystery how it ended up in Hungary undiluted.