i suggest that instead attack, defense,position and condition we have now be changed in
- all back - making all players stay near box to deffend heavy attacks when you need to defende in some section of game
- press the play - instruct players to stay closer to oponents and prevent them to pass corectly
- cannonade - try to score from distance more offten if your oponenet play very defensive
- push forward - all players move from goal and press defenders to steal the ball
Every instruction last 15 min of game and cant be used twice in same halftime
Think that will favorize attending managers to make more changes in field in right time
Also i think that should be some changes/addings in players skills like
Slider - defender will offtenly block the shoots and stops counters but can get direct red card and injure players
Delivery - for mid players that can lounch precise ball directly from his part of field in front of attacker alows him to have more chance for shoot or counter run
One touch - atacker will voley shoot outside or inside box rather than taking a ball and drible before shoot
Boxing - goalie will punch ball from distance shots over the bar in corners
That should be secondary skills and be able to train them only by playing games so they will need to play 30 games for learning them (even more if there be a way to slow down after season % lose) also that may be skill that drop if not play
Just an ideas, might need more look in to it