Personally I do not care that the national team players are coached by a manager of a country rather than another, what interests me is that the owner can ensure a proper workout to the player.
Here we talk about players for a national team is not a u21, many of the players in the current national team would reach their potential before becoming 22 years old if trained on an ongoing basis, of course managers were not motivated to train the players.
I myself have reached a potential of two of my players (8) in the season when they had 21 years.
To remain the most promising players in Barbados .. Why not, it is important that managers are willing to make sacrifices (constant training, coach level 4 or higher, let him maintain a high form ..), but it is said outside that things can get better.
As I said in my post of presentation: I was a member, for several seasons, of the scouting staff of the Italian national team U21, which followed promising players to train them as best for them to play in a national "rich" and competitive as the Italian one. I have personally built several players who have played in the u21 national team and national team of their country.
I can say, therefore, to be clear what it is used for a player to be a player from the national team.
I'm sure i will have more questions later today?
I'm sorry but I can not know if you have other questions in the day =P