Crazy ideas with UEFA Nation League because most important with commercial and money only by UEFA institution depending how bad impact for player later get injury, I don't think UEFA Nation League as most important competition because on FIFA matchday all European countries could held with friendly match without playing seriously at UEFA Nation League. Almost few months later with FIFA World Cup 2022 begin but still have not important match and UEFA Nation League keeps playing for two games.
England have drop to second Nation League and looks not really serious against with Germany, I don't see have potential chance with UEFA Nation League most excited to watch although with big match between Germany vs England because both countries try how to protect their player from injury.
But UEFA's idea for the League of Nations is to "force" countries to use less used players and thus create greater turnover. Of course they cannot say this directly. But they say between the lines, when they talk about a competition to create greater competitiveness and allow more opportunities for other countries to be more competitive.
The fact that the competition is a little undervalued by the big teams, ends up allowing smaller teams to grow and even win trophies. And that increases their prestige, they earn more money and gain opportunities, which were more difficult before.