It's down to money. There are a lot more options at 168 than there are at 175. You've got Froch, Bute, Kessler, Abraham eventually. Lots of attractive fights. Dawson needs fights like that so he can show how good he is and become an attraction, become a moneymaker in his own right. If he can make 168 without it taking anything away from him he'll be an animal at the weight.