I wonder if they'll find an ancient E-V13 sample from the South Western Balkans, matching an Albanian branch. We have E-V13 Thracians, Scythians, Avars, etc, so I don't think it would be surprising if some E-V13 became incorporated into the Illyrian sphere, early on.
Same with Greece and Italy, I'm sure with more samples in the future, we'll see which branches of E-V13 is Dorian, or Thracian, or Illyrian, Arvanite, etc
It seems E-V13 branched off in many directions in antiquity, contributing a minor or major role in various ethnic groups, given its modern spread and frequency, while J2b2 was more confined to the West, while today it's more confined to the South-West Balkans, only popping up in negligible amounts elsewhere.
Channelled Ware spread as an intrusive new element as far as Troy and Macedonia, and we already know they came at least close to Albania fairly early, even more so in Southern Pannonia. This means they mixed at least since the LBA in some areas, in which some Illyrian-Thracian amalgamates emerged, usually by one side conquering the other in the Iron Age.
But this also meanst hat the great majority of E-V13 is not to be expected before about 1.300 BC the earliest.