That 65* could have been a match-winning 165* if he would have had the confidence to bat at number 3 and not hide at number 5.
Faf and Rossouw nearly batted for 30 overs between them and trotted at a SR of 75, while the vastly superior captain de Villiers was sitting in the pavilion with his feet up, restricting himself to 20-25 overs only. The end result? He played the best knock of that SA innings, but he did not give himself enough time in the middle to take the game away from NZ.
Yes he did not know that the rain will curtail their innings the way it did, but that is what happens when your best batsman bats as low as number 5 in ODIs. In Limited Overs cricket, you need your best batsman to face the maximum number of deliveries, which means he should not bat below 3. Yes he has been batting at 4 lately, but he spent most of his peak at 5.
Had de Villiers batted at 3 in the game, or in a lot of other important games, the result could have different. It is criminal for someone like Faf or Rossouw to bat above him.
In response, the NZ captain lead from the front and took the game head on from the word go. The early onslaught put SA on the back-foot, and in spite of the stutter in the middle-overs, they were able to ride on that momentum and the RRR was never out of hand. If he would have demoted himself below the likes of Williamson and Taylor, the outcome of the match could have been vastly different.
The reluctance of de Villiers to bat up the order has cost SA many matches, and batting at number 5 doesn't really help when you are not a top finisher like Dhoni either. So the end result is that de Villiers either arrives to the crease when it is too late to change the game, or he plays a fancy knock and gets out before finishing the job, which means that his stats look wonderful on paper, but he doesn't win big matches for his team.