I am not sure why are you putting Marxist times or outlandish stuff.
Enver Hoxha period, 3rd world tier interpretations, just plain historical fantasies.
The main important thing is to settle the EV13. It could be in Dardania, and it could be in Dacia or Macedonia! Whatever is fine!!!
It's already been found in Macedonia near the Thracian border. It is guaranteed to be found in Dacia and anywhere Daco-Thracians lived including eastern part of Dardania. And that is the point, E-V13 is Daco-Thracian.
That will resolve many issues and will define may things. It could be a combination of Illyrians to Dacians, Illyrian to Dardanians or Illyrians to Macedonians.
Believe you me, it will become crystal clear to everyone once more data settles it. But I am certain rrenjet and co will ignore the consensus and live in their own la la land, isolate themselves just like in marxist days of Enver.
It will push research to similarities between languages of the two until now different groups, but as it may appear closer than it was before thought.
More research is needed to study the non-existent similarity between Daco-Thracian and Illyrian because you badly need E-V13 to be Illyrian. Good point.