The problem with Australia is they aren't mixing things up. Trying something different.
Everyone knows Warner will open the batting. Once in the while, shake up the order. Put him in at 3 or 4 and let him just f**king explode.
I don't think he needs to explode. I have watched a lot of him in the IPL. And while Kohli gets all the media headlines, and Bmac, Pollard, and Gayle all the hype, Warner is consistently the best imo pacer of an innings. He doesn't go BMac beserk, but he maintains a very very high SR (and average in accumulating big score after big score) just with a as casual as you like lofted drive for 6 every 8 to 12 balls or so in between boundary shots and working the ball around.
He can match Pollard and Russell for high strike rate, but unlike their big swing after big swing, its rather innocuous. Even the lofted drives for 6 are just par for the course with Warner in the IPL.
Since 2014, Warner has averaged 52.95 at 148.57 in the IPL. And back to back 600 plus runs seasons in 2016 and 2017 averaging over 60 at 144 to 150+ SR. He has the ability that Gayle doesn't, to work the ball around, and he has what Kohli is reluctant to do, go aerial in the first 6 overs. But he does with such a nonchalance, that he flies under the radar as against some of the fellow superstars with their more brash approach to batting and headline grabbing.
I wouldn't mess with Warner's role, may just say to him - up the SR in the first 10 a bit, but I would keep him doing what he's doing. 2 years in a row he has made the ICC ODI team of the Year with damn good numbers.