I think that in Travis Head and Marcus Harris, the selectors theoretically have two of the top six batting positions pencilled in for the next five years. However, the selections of Finch (as an opener!), Marsh and Handscomb can’t be sustained due to their inconsistency and/or current technical frailties.
If “runs are the currency”, then Matthew Wade with 571 Sheffield Shield runs @ 71.37 should be considered for selection soon if a replacement/reshuffle is needed in the top order. He needn’t take the gloves, mind. I think his fight and grit and snarl in that top six could be beneficial.
I also think that the big decision has to come soon regarding Australia’s new ball pairing of Hazlewood and Starc. To paraphrase Shane Warne: “Mitchell Starc hasn’t played 45 Tests - he’s played the same Test 45 times”. Too often Starc’s new ball offerings are left untouched or arrowed down leg side. It then puts enormous pressure on Hazlewood to strike early and compensate for Starc’s profligacy. I would almost consider pairing Pat Cummins with Hazlewood and give Mitch the slightly older ball.