Here is Kolonje in antiquity
See, Antiquity, different time frame in the 3rd-2nd century BC. By that time, not just Channelled Ware was gone, but their successor-daughter groups too. They all had transformed into new subgroups, some even disappeared, others being assimilated and soaked up. 2nd century BC is a completely different world in comparison to the EIA.
There are just kind of original Illyrians, of which we don't know how far to the East they were, this will be interesting and possibly testable, also with the help of this samples. Like the hallmark for Illyrians is J-L283 and increased Bell Beaker-like ancestry for the Balkans. The question is how far it reached when.
Channelled Ware came in later, in the transitional period and Early Iron Age. And they met along that contact zone. I said that before and I posted maps showing it, before this paper. Some ridiculed it, but fact is, there was a contact zone of these two major formations in the Balkans.
By the later historical and later periods of Antiquity, the Southern Illyrians had completely fused with those local people and Channelled Ware. That's why you see the unchanged Illyrians still scoring a lot of J-L283 and Bell Beaker like ancestry, while those in the East being a mixed and fused group, whether they spoke Illyrian or not.
It's like it is with later South Slavs. Slavs they are nevertheless, but shifted in the direction of locals and later influences. Same here. You have actual Proto-Illyrians (J-L283 dominated and more Bell Beaker shifted), and then you have later Illyrians of which some still have this profile, while others mixed with Channelled Ware, Central-Eastern and Southern Balkan people.