Of course. As is often the case.The only way to verify is to sample Bronze Age burials from that area. Then, we can have a precise picture.
That is a totally valid point I have raised. Plenty such examples exist in archaeogenetics.Come on man, don't resort to those kind of arguments. You're better than Brumi and his kind.
With regards to the Albanian medieval sample, well, I went by what the authors of the paper have stated. I also double checked and it is human remains (not wood or other archeological artefacts) that have been radiocarbondated. A reservoir effect might be possible or we are really just dealing with a case of more strong continuity in the region.
In order to test this hypothesis high coverage aDNA samples are needed to confirm downstream clades beyond R1b-Z2103 or CTS1450 level or any other major clade of Z2103.Mount I have always argued for R1b-Z2103>(CTS1450) being centered in the central Balkans, but there is a specific branch that was assimilated into Illyrians during MBA and their decedents invaded Macedonia in Iron Age. There is no contradiction here, they expanded at the expense Paeoni who also are under R1b-Z2103>(CTS1450) and not Illyrian.
I favor a local Bronze Age origin but that is just my opinion I am emphasizing. I think there are good points speaking in favor of this. Deviates a lot from your proposal that I don't agree with, other than that, too, totally valid.