Its funny (as in humorous) looking at debates about "world best/class" players. If you look back on Wallaby sides with players held up to be world class/best which succeeded at RWC/Bled/multiple test win level people always argue about them saying good but not world's best.
Lynagh - held the points record etc etc but at the time many said he wasn't as good as others running around like Fox.
Campo - the man that has most polarised Australian supporters that despite his scoring record and unarguable abilities still manages to spark arguments about his world's best status, with numerous wingers/FBs over his career being listed as better, even within Oz players.
NFJ - same as above. Just not quite there apparently
Only two players seem to be above comment when arguments of this sort come up - Horan and Eales.
In a modern context I argue that the individual aspects matter far less than the group/team dynamic and the mode of play the team adopts. In most aspects this is the same Tahs side, in terms of individuals, that played some of the worst Rugby I have ever had to sit through, this year and last year though we see the dynamic has changed totally and individual execution is different. Have the players become innately more skilled, or is it about game plan and fine tuning the skills that these athletes already have.
This world class/best debate is largely redundant when you consider the individuals on such a basis.