My fear is that the selectors will take them (being broader here) seriously and think that "Quick! Drop Clarke! Drop Katich! Install Smith as a 4th specialist bowler!". I mean, FFS...
And yes you are correct. Let's compare the team that walked out on the 1st day four years ago and the team that will walk out in a month's time.
Hayden, now Katich - No contest
Langer - Watson - Again, no contest
Ponting stays, but has gotten worse - mind you, he had to, the Ponting of the "live" tests of 06-07 was a sight to behold, is now just "good"
Clarke stays, has gotten better overall but like Ponting was stellar during the "live" tests (but not that stellar obviously)
Hussey stays, was also stellar during the "live" tests of 06, but unlike the above two is now genuinely poor
Martyn, now North - No contest even with Martyn at the very twilight of his career
Gilchrist, now Haddin - no contest
Warne, now Hauritz - ...
Lee, now Johnson - probably the one with the most similarity, as Lee was pretty poor IIRC for the "live" tests
Clark, now Hilfenhaus - No contest, as good as Hilf is, Clark was quite simply outstanding
McGrath, now Dougeh - No contest
So that makes 7 replacements which are definitive step downs of varying degrees, 2 players who have gotten worse, one quite drastically, one debatable and one improvement.