That's just an assumption...there's no evidence that the championship will actually be a step down in physicality, although I suppose the game will be slower. I agree that sending players like Bertrand, or even strikers like Lukaku to the championship is a good move as it can help improve your technical attributes. But in Josh's case, I don't think its the same. I feel that he thrives on the attacking runs/positioning of other players so that he can influence the play with his passes. I doubt he will encounter too many of such players in the championship.