There is one thing for sure that albanian is a paleo balkan language which is supported by most linguists,would be thraco-dacian or thraco-illyrian.
or you want to say that thracs dacs or illyrian spoke slavic, and if r1a/i2a was there then what were slavs? J2 or e-v13? Lol you gotta be kidding me and yourself.
Your hypotheses have no linguistic, cultural, or historical ground.
you can believe that south slavs are thraco(daco)-illyrian, same as you can believe in ghosts, vampires or whatever you want no one can stop you from believing.
Thracians/Dacians were I2a/R1a people. Illyrians probably. Only Macedonians could be mostly E-V13.
I was trying to find link E-V13 with Illyrians. Some Albanian and another authors wrote about Ancient Egypt, Anatolia, Caucasus, Sicily, Epirus etc. However problem is that link E-V13 with Illyrians is thin. Surely among the Thracians and Illyrians were E-V13 but to a small extent, together with J2. Thracians and Illyrians probably were dominantly I2a/R1a people.
Of course for language today there is more evidence than yesterday.
I read a lot Albanian sources about link between Albanian and Illyrian/Thracian.
However link has never been proven.
There are various hypothesis however it is logical that I2a/R1a people have similar languages to some extent.
Then I saw solution. One my friend Luthuanian gave me proofs:
Thracian/Dacian as Illyrian has same or similar words as Balto Slavic languages.
There is one of theory that Thracian is Baltic language, and that theory has basis.
For example:
balios (Thracian), baltus (Luthuanian), belo (Serbian), white (English)
zilma (Thracian), zelme (Latvian), zelen (Serbian), greens (English)
udra (Thracian), ūdra (Lithanian), vidra (Serbian), otter (English)
gin (Thracian), gnins (Latvian), gnjiti (Serbian), spoil, decay (English)
brink (Thracian), brinkti (Lithuanian), breknuti (Serbian), swell (English)
kiri (Thracian), giria, gire (Lithuanian), gora (Serbian), mountain forest (English)
saltas, zaldas (Thracian), zelt (Latvian), zlato (Serbian), gold (English)
zum, zuml (Thracian), zmaj, zmija (Serbian), dragon, snake (English)
laza (Thracian), laz, lazina (Serbian), clearing in forest (English)
Etc.
There are a lot of authors who claim that Thracian is Balto Slavic language, and it is not new, for example several authors and books:
Neroznak, V. Paleo-Balkan Languages. Moscow, 1978.
Fasmer, M. Etymological Dictionary of the Russian Language. Moscow, 1986.
Duridanov, I. Ezikyt na trakite, Sofia, 1976.
If someone sees geography he identifie that Balto Slavic people and Thracians easily can be linked geneticaly and linguistic:
Balto-Slavic people and Thracians are R1a/I2a people, and they spoke languages which belong Balto-Slavic group.
It is so logical.
It is very difficult that Illyrians were not R1a/I2a people.
But Macedonians maybe, it is possible that Macedonians were mostly E-V13/J2 people.