In Manager Mode, you earn experience points after each match that can be used to improve player attributes or buy new traits. You could "sell yourself to the devil," as EA put it, and sell a trait like Injury Prone. Basically, you risk injury, but you get some currency to improve other attributes like speed and power. Of course, you could break your leg the next game as well.
This represents a departure from the current Manager mode, and EA calls it more of a "pimp my team mode" than a traditional manager mode. Normally, players have traits and that's it. "Now you can customize not only your team but your players"!!, as if they were cars in Forza Motorsport.
Source: IGN.com
This means definitly that edit mode is in the game!?
sorry for my english