I have created several set pieces but none of them can be used.
In any game I select the set piece I want and when the screen comes back it shows no players of mine in the box, just two guys back on the half way line.
Then when the ball goes out of play the game crashes.
Set Pieces cause serious bugs. If you happen to save on top of default, then your entire squad will experience glitches like all players having #10 shirts and looking alike, your custom tactics getting screwed up, etc.
You can hope to use custom set pieces from FIFA 13 onwards, provided EA does test it extensively before releasing a half-assed game.
"Take your best shot, Flatlander woman". JC Denton.
Not sure how that answers the issue as I did not originally have this problem on PC nor the Xbox 360.
Not the end of the world but I really wanted to have a lot of players in the box, hopefully EA work on that for the next series.