There's an unlocking glitch going around.
1- Go to pro club leaderboards and select any high rated pro you want.
2 - Click into there pro attributes and scroll through a few pages.
3 - Go back to you edit pro screen and you will of unlocked all that pros traits permanently.
You also unlock
Penalty kick styles
Free kick styles
Signature Finishing moves
Can't see this getting patched as it's not as malicious as the 99 rated pro glitch that did the rounds a while back, just for those who don't want to grind out the accomplishments.