i have seen a lot of forums with attributes needed for player development. everyone thinks if he has low determination he will never develop. i don't know if it is posted on fmscout website but those who want attributes needed for player development guide read the article below from football manager stories
website who has researched a lot of forums
https://footballmanagerstory.com/which-attributes-influence-player-development-in-football-manager/
website who has researched a lot of forums
https://footballmanagerstory.com/which-attributes-influence-player-development-in-football-manager/