Ive said it before, but il say it again since people keep pushing the idea.
Skelton is a potential liability, its easy to say he can come off the bench and be used as an impact player. But what happens if one of our starting locks is injured in the first 5mins like Moore was. We are then stuck with Skelton playing 75min when his fitness level see him barely playing 60min at Super Rugby level. Including Skelton in the match day 23 might be an enticing concept for his impact ability, but in terms of balance for the squad his inclusion throws up a few issues.
Alternatively you look at someone like Luke Jones, he is an 80min player and he can also play blindside flanker if needed. Does he provide the 'impact' that Skelton provides, probably not but he provides greater flexibility and redundancy to the team.
I agree with your summation of the locks here , TOCC.
Skelton is in the full squad as a cadet, learning the semi-dark skills of the trade, and to encourage him on as he really does have long term potential.
Between the remaining two French tests, the Rugby Championship, and the End of Year Spring tour there are 12 games at high intensity.
The Wallabies do need back up locks as Carter's injury is already proving. I see a strong possibility that all the locks in the squad will get game time, on more than one occasion.
Skelton and Jones need to learn the calls and the channels etc, as has Carter. Even though Carter had a fucked ankle for 70 minutes plus he wasn't going to capitulate his position and give another sucker a break. Thats the mongrel and determination I LIKE TO SEE of my country's test team.