No bad. Im using players out position since I started and it's rare the player that have a obvious penalization in some sense. If you know how to choose the players, 90% cases you will have more benefit than the penalization that gives you a yellow or red triangle (1%-2% possession). External skills don't matter as affect "slightly" to the internal programming by default.

The proof is that some st's score 40 goals in 40 matches with 5* and you can train a ST till 9* but despite how much SPs you add to any skill maybe never will score more than 10 goals in 40 matches. That's why I say, the external skills affect slightly in many cases.