The 3-OH system in Lube was not built by him. He did put Alex in the OPP position a few times, but not in a regular lineup. Medei translated the Bulgaria 3-OH system to Lube last season.
Nope, Blengini played with Zaytsev as a receiving opposite, and Nikolov as a (partially) non-receiving outside hitter in the playoffs in 2023, and was actually close to winning a championship in Civitanova. Nikolov at that time had big issues in reception and Zaytsev was washed offensively, but was a better receiver than Nikolov. The result was that Zaytsev prior to getting injured in the playoffs received much more than Nikolov even though on paper he played as an opposite, and Aleks played as an outside hitter - while Nikolov got more sets from De Cecco offensively. Then, Civitanova hired Lagumdzija for two years - and returned to the 3 OH system last year because they couldn't find a decent replacement for Adis.
Zaytsev / Asparuhov / Loeppky playing as receiving opposites are just different iterations of the same idea introduced in Civitanova for the first time by Blengini in 2023. Nikolov is also a much better player than in 2023, so he receives / spikes from position 1 more, but the concept of a 'fake opposite' is kinda the same.
Anyway, the point is that Blengini is one of the most creative coaches tactically at this top level, so it will be interesting to see what he can bring to the female volleyball. Not that he'll play with Egonu as a receiving opposite, lol, but he may have some interesting ideas.