He is more tactically astute nowadays. In the current court condition, it is very difficult to blast a winner in one strike against good defenders. It is also riskier to go for broke too often. Better strategy is rallying, changing ball direction to control the court and to slowly find a good opening.
I think the reason of Djoker's loss in the first set is he goes too much for kill shot without maneuvering and wearing Murray down first. When he slowed down and built up the rally later on, he won quite comfortably.
His offensive mindset is still there by actively controlling the point and the court.