I disagree (as do the masses based on the poll), but you are more than welcome to voice your opinion.
Well, I also disagree. I agree with you that "first come, first serve" isn't the ideal solution. And it's not always easy if the U21 and NT managers disagree and don't work together. But to be honest: even in micro-nations it won't be every day that you have players like those two 100k players that could both play u21 and NT. We did have one guy (Scott Broszeit
(22633131)) in Germany who could make the transition right away (or very shortly after) into the senior NT even though our NT isn't too weak. And I remember one player from Hanguk who is their all time leader in games and rebounds who did make the team at age 22. But both times, the U21 benefited more from those 21y olds player for those teams than for the NT.
And (even though I wasn't playing BB back in season 6/7), there were a couple of young very good players and the nt/u21 collaborated and released two players (Anichtopodis and Motte) after the u21 final
(4822) against spain to play in the NT finals (also against spain
(4891)) 3 days later.
So what I'm trying to say: it's possible to work out solutions. And: in my opinion it's not really realistic if a player plays two games at once (happening eg during allstar-game and BBM-matches). I like it that BB is trying to be quite realistic (even though the game changes and not all convinced about the implementation of the GDP as a solution instead of balancing the tactics in a better way ...)
Still, I love this game and I'd like it if there would be a solution. But not one where a player can play both for the nt and the u21 at the same time ...
Du hast nicht genug Geld, um dieses Gebot abzugeben!