I to had a talk with whitebeard about experience and how much it helps in close games.  I think a player deserves to be in the squad no matter how old they are if there skills are good enough to be there I reckon Mansfield will may still be in the squad next season depending how many pops down he has this season he may turn into a bench player as walkers experience and skills progress next season. 
Young players will most likely make up the 17 and 18th spot of the squad but they would be the best two that aren't in the 15 man strong rotation these two goings players maybe 25 ur olds or of younger if there really good will play in easier games that will be wins anyway against weaker teams to gain some experience and in courage there coaches to keep training.  
To do I think players will stop at 3 I hope not I want my coaches to want there player to be the new star of the national team. If every manager wanted his player as the star the team will become stronger as whole instead of one person training a player to be the star while the rest stop and are content with being in the 12 or a starter.
Ps ill put wang ;) :p
                                
                                
                                
                                
                                
                                
                                    Australia NT coach. Join offsite forum for all things Australian http://forum.buzzerbeaterstats.com/