good point,
I could make 2 line-up. one for important tournament matches, and another for interleague matches and friendlies.
In my opinion, trainable stats are more important.
I prefer a player with 4 star in scoring, passing, dueling, even if strengh, speed, are lower. You have to concentrate on training main stat to 4 stars. then 3 stars tactics. and you become solid.
Our 21yold players have amazing non-trainable stats, but they dont have 4stars in their main trainable stat... so older, slower players are still the best choice at the moment.