Change of approach at what level? in what capacity?
He has certainly changed his approach to the season.
You can change bikes, weight, schedule, teams, team mates, tactics, attitude etc. all of which he has done.
However one can never change one's body type. As good as he looks now, as well as he prepares, as persistent as he will be, he can't change his body type. He does not have the capacity to adjust to or create the necessary surges and changes in tempo in the critical mountain stages to win a grand tour.
he might sit is wait like this past week and worlds and benefit from others miscalculations certain races. but the probability of that over 3 weeks is a goose egg
is there anyone here who thinks he can match the accelerations in the mountains and recover between them fast enough to create his own attacks? It is just not his MO as a rider. Mentally he wants to but....and tries too but...