Looking at the Test selections.
Weatherald - made 900 plus runs at 51 last season opening for Tas, after being kept out of the team by Ward and Jewell the previous season. All three are leftines. He has averaged over 41 this season in the Shield. A more freescoring batter than most others in the Aus top order.
Green - hasn't bowled much yet. At least he is only 26. We need young players like him.
Abbott - aged 33, but at 138kph was the fastest bowler in the Shield at Bellerive last season - apart from Riley Meredith who cranked it up to 148kph. Potent with new ball but loses efficacy as shine goes off it.
Doggett - beautiful, smooth free flowing action. Has had injury issues.
Fergus O'Neill - not selected. However, is young, accurate only bowls about 125-130 kph. He has taken the most Shield wickets in last 2 seasons. Another 5-7 clicks per ball and he would be in the team.
Labu - no problems with his selection. He has scored plenty of red ball runs to redeem himself.
Webster - IMO has done well in Test cricket. The consummate all rounder - bowls pace, spin, bats and is Aus's best slipper. The only prob is he was injured for first Shield game, Crick Aus asked him to be rested for the second Shield game, and he played the third - only scoring single digit numbers in 2 hits against Vic. Has scored difficult Test runs in tough circumstances, when others ahead in order have failed. A pressure player.
Konstas - long term future of Aus cricket - but then again Renshaw looked like it at age 21 too.
I agree that too many Aus Test players are too old, and any team needs renewal, but the younger gen aren't breaking the door down to replace them.
Should Bailey et al tap Usman and Lyon on the shoulder? IMO yes! Both have been greats, particularly the GOAT. Of course it suits me that a batting line up of;
Weatherald ( age 32, lot of red ball Shield experience)
Labu
Green (don't want to put pressure on him bowling, and need to develop his batting)
Smith
Head
Webster
Carey
Starc
Kuhnemann
Hazlewood
Boland;
has 3 Tasmanians in it, but it is a younger team.
Many Aussies don't know it as few watch Tests played abroad, but left arm finger spinner Matt Kuhnemann ( aged 27), was the top wicket taker in SL Tests this year with 15 poles. Inglis also scored a good ton there.
We also have 2 other good right arm finger spinners in Shield ranks - Murphy and Rocciocioli.
Usman is also looking a bit old in the field. Weatherald and Labu are better fielders. Idiotically, Aus have tried to hide Usman at first slip, when Aus's best slipper, Webster, has been fielding in the outfield to accommodate Usman! Webster dropped a catch at slip in last Shield game. Nobody could believe it!