I have one mc with free kick SA, he scored like 24 goals in 50 games so far. The free kick bends around the wall. Average 1 goal every 3 free kicks he takes. Not exactly useless but better than none. My other striker without freekick SA but way higher shooting skill probably gets 1 goal in 6-7 freekicks he tried.

Teams that play attacking and long ball usually gets low possesion but number shots on goals is not bad.