If you are watching Frederic and expecting him to be a bruising enforcer type, then you will be disappointed and you will be missing what is going on with his game. As
@PlayMakers pointed out some time back, Frederic is not trying to be a 4th line tough guy, but a center in the mold of Charlie Coyle: using his size, strength, and speed to protect the puck, create a cycle game etc. He has pretty soft hands and decent vision, believe it or not, and if you watch him with this in mind, you can definitely see where he is going with his game (and where the Bruins would like him to get to with it). He has enough of a skill set not to waste him as a 4th line smash hockey grinder. That may be all he ends up doing with his career, but the goal is a bigger one and he actually is making some progress towards something different.