I'm not saying there's something wrong with your strategy... I play this game mostly cause I like to see my players improving, I can't wait till next salary update, I enjoy it :)
The positions I don't train, I simply buy some good players... And I buy centers with good Passing, cause they fit perfectly to Outside focus Tactics... But I like to have foreign players in my team, from different countries and continents... It adds much to my enjoyment of the game...