Gurn Sumal, Game Modes Producer at EA Canada, has released a blog detailing some additions to Be A GM Mode in NHL 12.
So along with all the sim engine updates and Retired Jersey’s we have made tweaks to the other systems in Be a GM mode like trading. The trading engine has been reworked so that there is bigger difference between star players and your average NHL player in terms trade value. You’ll also notice the CPU proposing trades that make a lot more hockey sense for both teams (a lot more player for a pick or player and a pick for a player trades). We also added excess trade offer logic that quite simply says if I give the CPU a trade that is too good to be true, it won’t care about its trade block ie. Sidney Crosby for Shawn Horcoff (a really extreme example). This added logic will help with some of the frustrations from last year.