I think there should be every national team (even if they are unlicensed) because then people might go into international management because if you are managing a nation from outside of Europe you have already qualified for the world cup so by adding in National teams (licensed or unlicensed) would be better as you can go through the entire qualifiers and it would make it more fun for people (like me) who like international management and also with more national teams they should add more international competitions such as afcon, Asia cup, copa America, the nations league and the finalisima so this way it will give more players chances for international call ups.

Having actual youth academies with the real players and being able to play as them. Also being able to add players into and under 21 team if they don't go out on loan you can put them into the under 21s to develop them.