The reason that the wings had an edge in Europe is because of the scouting system they put in place. Other teams were not as serious about Eropeans and remember the 90s was still the infancy of data being available globablly. You couldn't go on the internet in 1991 and download stats on every single hockey leauge in the entire world. Scouting was boots on the ground and Detroit sent people to Europe and Russia.
Remember in the 90's you heard first European this First Russain that. Because no one systemically drafted Europeans and Russians until the 90's. If the Russian 5 did not defect the wings would have wasted all those picks.
The European boat that docked in Detroit was not system of statistical evaluative methodology it was just boots on the ground when no one else was doing it and risking picks when you didn't know players would come over.
That advantage died when other teams caught on, and then even more so when the internet made any 15 year old in the world with talent global knowledge.
For the Soviets that was more because they couldn't come over.
Also don't recall Detroit selecting anyone from Soviet Union until the 89 draft which is when the floodgates were opening for Soviet players to leave. Which coincidentally included 7 players from CSKA Moskwa. 89-90 was like the first season that Soviet players started playing in numbers.
Fyodorov and Konstantinov were among the 2 players from CSKA Moskwa selected that season. At that time there really weren't any bad players on that powerhouse. If you were drafting from Dynamo Moskwa, meh, bad luck I guess.
Keep in mind Fetisov and Larionov played most of their Soviet careers for CSKA. Althought they weren't drafted by Detroit. Also, technically they didn't defect, their leave to North America was granted by the Soviet state.
Speaking of Fetisov, New Jersey actually took 3 Soviets in 1983 draft, one of which was Fetisov. 6 years before Detroit drafted their first.
Quebec also took a few Soviets as well, which included Gusarov and Kamensky. IIRC, both won cups after franchise moved to Colorado. Again, taken before Detroit drafted a single Soviet.
Kozlov also ended in CSKA after he was drafted by Detroit.
Keep in mind guys like Fyodorov, Bure, and Mogilny were already stars from the U20 touraments.
Soviet national teams and others also showed off their talents in exhibitions at times. A handful of games can be found on youtube from the 80s.
As for rest of Europe.
There were about 40 Swedes taken in the draft before Detroit took their first.
They went pretty heavy in 1984 taking 4 and striking out 4 times.
In 1985 they took 3 more and struck out.
In 1986 they finally hit gold with Garpenlov and whatever you want to consider Djoos.
1 bust in 87
Got platinum in 89 with Lidstrom than nothing until the mid 90s.
Just a note, St. Louis had already taken 6 Swedes by the time Detroit drafted their first. That is ignoring the 3 they drafted in same draft class as Detroit. Again, all taken before Detroit's pick.
80s/90s Wings weren't big on the Fins. There were no Fins taken between 87-97.
Edmonton did find Kurri and Tikkanen.
Winnipeg found Selanne and Numminen in the 80s.
About 8 Czech/Slovaks from 80-99 with Klima and Fischer being only ones of note.
Conclusion: I really don't think that statement of Detroit being the first to exploit "hidden" European/Soviet talent to hold much validity.
Even with respect to the Soviets, they were behind the curve. They only started drafting Soviets when it was obvious that they would be allowed to come over and play.
Afterthought: I do wonder how much NHL salaries came into play with recruiting foreign players in the 80s. I mean by 89 there were maybe only a dozen players making 7 figures. I heard even in the 80s many players didn't break 100k per year.