I do like the second part, but coaches should have their passport knowledge ready when making substitutions. I would have preferred limiting the licences regarding players not eligible for German-NT, so the coaches don’t have to consider passports when working on the best lineup of the team.
At the moment, no coach of the 2. Bundesliga Pro needs to know the nationality of his player by heart. Because the Skurios Volleys Borken, which is the team with the most foreigners, have four foreigners. Therefore, no incorrect changes are currently to be expected.