The problem with consigning Ponting and Haddin to the scrap heap is that they've had 2 good Tests out of their last 3, and Haddin did some good work behind the stumps this series. I think both will play on Boxing Day. Haddin will hopefully get a stern talking to and a last chance to impress and Ponting will probably get to go out on his own terms. The other thing working in Haddin's favour is that Tim Paine is still out. I'm sure the old selectors were favouring Paine as the long term replacement rather than Wade, perhaps the new ones do too, so that might buy Haddin a little more time until Paine's future is clearer.
As for the batting problems, it's not so much experience - it's someone who doesn't automatically flash hard at the ball or reach for stuff that he doesn't have to play. Khawaja could be one of those more prudent guys, but he's looking down on confidence and could really use some FC runs - but oh wait there is no FC cricket for 2 months...
. Cowan could be a prudent guy from what I've seen, I think he and Watson would be a good opening pair, maybe with Warner down lower. I'd rather not move Watson down at the moment given that he's finally found his spot in the international game. Warner seems a more moldable type player that should be fine down at #5/#6.
So without Ponting I might go something like this:
Watson
Cowan
Marsh
Clarke
Hussey
Warner
By the time Hussey goes, hopefully Khawaja is ready to go.
And I think we've conclusively proven that Justin Langer as a batting coach is as useless as deckchairs on a submarine. There's no discipline, the techniques are not improving - I'm not sure what Langer's actually doing apart from ruining things... There needs to be SOMETHING done. I dunno what, maybe any batsman who plays at something he doesn't have to in his first 20 balls should be publicly shamed or flogged. There needs to be some consequences.