I don't know that Bute's loss to Froch, a high quality fighter, necessarily was career-threatening or dishonorable, although few foresaw him getting dominated the way he did. Could be a styles-make-fights thing.
But I tend to agree with django that he would do a lot better with a different strategy.
If an almost 50 year old Hopkins could school Pavlik, a twentysomething Ward should be able to do the same even if Pavlik has improved substantially (a big if, considering his inactivity.)