This is a fair point, but the one advantage he is always going to have is his size. He'll be bigger than every defender he plays on.I still think there are technical flaws in his marking and he needs to work on being stronger in a contest.
Before I get howled down about 8 marks in a grand final I would suggest 5/8 were on midfield opponents or chest marks.
The strength in marking I am talking about is when he is marking above his head against a backman or ruckman of height and strength.
If he is getting up the ground on long leads and working hard doubling back, he'll create his own mismatches and be marked by those smaller players.