First of all, there's no reason to use HRV_EBA and HRV_MBA when we have HRV_IA. Unless you think there's genetic continuity in the Dalmatian region from the Early Bronze Age..
Just like modern Greek mainlanders plot close to the Logkas samples by coincidence, it's a similar case with other Balkan populations as well. You're doing the same thing we've all been accusing the Clemente et al paper of doing, i.e. proposing continuity arguments that are easily disproven ("Logkas = modern Thessalonicans").
Since all modern southern Balkan groups form a cline, there's 2 ways for your argument to be true:
1) Albanians are pure descendants of early Iron Age Balkan populations and all other Balkanites (including Bulgarians) are basically Albanians themselves. Also, the Slavs never settled Thrace, Macedonia, Thessaly and the Peloponnese, nor did any other major upheaval happen.
2) Albanians are pure descendants of early Iron Age Balkan populations and they miraculously happen to fall on a cline with south Slavs and Greeks.