If someone want to get an usefull data from DNA then he must make some serious efforts.
First one important thing is that modern distribution has very little value. For example we know that there was a huge migration from Near East in Roman Empire. Armenians migrated a lot in medieval time toward west. Paulicians were deported to Balkanes in large masses. Some 30% percent of modern Greeks DNA has Slavic origin. Semites of Bronze Age were predominantly J1 and J2b1 while modern Semites in Levant had much more Y dna diversity.
That is why just one ancient DNA is much more important than tons of modern. The same is in linguistic. Just one old sentence can have more value than hundreds of modern words.
Concerning L584. Currently the oldest L584 is found in NW Iran. If someone believes that it came from Balkanes then he must prpvide an older L584 from Balkanes. Also if someone believes that Armenians came from Balkanes at Early Iron Age then he must explain the presence of I2c2 in LBA Armenia in a elite burial with chariots.
I don't even use here autosomal arguments which is a must for making an argument in more serious discussions.