Gnostic you are on your own in with regards to Vickerman, he is still the premier lock in Australia. What exactly were you not impressed with during the WC and the TNs?
How is he the premier lock in Oz? I am not alone in my thinking as you would like from your post. Before the RWC quite a few here were dubious to say the least regarding Vickerman's assured Wallaby jumper without playing any Super Rugby time let alone recalling his last forrays to a RWC where Sharpe was blamed for the woeful set piece yet V. walked away scot free.
Tell me how exactly Vickerman improved the lineout or the scrum. He was back to his best in giving away stupid penalties that even the Kiwi commentators wryly noted. I failed to see the "stiffening" of our defensive linbe above what Sharpe provides, he certainly doesn't carry anywhere near as effectively (as Sharpe nearly always gets of the advantage line unlike most of the other Oz forwards) and despite the myth the statistics really don't show that Sharpe has poor security when he carries.
SO lets sumarise starting with the set peices which for a tight forward should be the first box ticked:-
1. Scrum - with Vickerman wasn't any better or worse than with Sharpe.
2. Lineout - Immensely improved with Sharpe. Given that the Lineout was supposed to be Vickerman's forte his displays at the RWC were woeful. But lets protect Vickerman and blame the throwers, or the lifters or the immense skills of the opposition. Fact is the problem with the other variables the same was not as apparent with Sharpe on the park. Still the best gauge on Sharpe's Lineout skill is the rating he has from his opponents, with Matfield amoung others rating him one of the best in the world.
3. Ball Carrying - I did not see one effective ball carry from Vickerman in the RWC. Sharpe for the limtted time he got was much more effective and without Palu or a fit TPN or Kepu in position there is not a decent ball runner in the Australian pack. Elsom is only good for running in the centres or on the wing when he is fit, as is Alexander, Pocock is usually buried somewhere in a ruck and McCalman is like a blowfly on the window pane for effectiveness. So without Sharpe there was zero go forward from the forwards.
4. Defence - Vickerman gave away the silly penalties that he was renowned for prior to his Northern sojourn. Sharpe on the other hand defended just as well, admittedly without the abrasiveness.
5. Set peice defence - a couple of years ago I was very happy to see the Wallabies pack actually challenge the maul of opponents with Dean Mumm and Sharpe regularly turning over the opposition at this phase. Where has that gone? I think it went with Michael Foley to a large degree but Sharpe has continued to display the infiltration skills that emerged a few years ago. Without him on the field the tactic is always the same do not competet on the lineout throw and attempt to sack the maul as it forms. How many penalties were given up that way this year and last I wonder?
In any event for the Tahs I would expect him to take a lock spot with Mumm to 6 whilst Elsom is unfit. Douglas to partner him if he has recovered from his second year woes, if not I would be looking to Peterson to step up. Most will be waiting with trepidation for the return of Timani, but a big question mark still remains over the fatigue factor with him.