I fully understand opening Yllse->Vyseus, but that's all it should be. What the hell is the point of opening Yllse->Zypern? That will help balance nothing, since Zypern has a decent number and higher dualclasses. Let everyone who wants to move into Vyseus and only Vyseus instead. Vyseus is the only one in real need of people right now, Zyperns are often there in war.
It seems that you are not taking into consideration that if a person goes to another nation, they stop existing in the previous one. 1 player to vys-> +1 for vyseus and -1 from an enemy nation ( Yllse ). That is also -1 from an enemy nation ( Yllse ) for the other, third nation ( Zypern ). So it would make sense to open transfers only to Vyseus who almost never have more than 2-3 people in war.
The current availabilities seem like they're made to balance power between 2 nations, but we have 3 nations in this game.
In short tell those fat lazy Zyperns to join wars more often.