Dont forget that the current Australian bowling attack would perform much better on the pitches from the 70's and 80's. What the WI gain in the batting the Australians gain in the bowling.
You can only gain so much and ultimately it boils down to how good you are.
Put simply, great bowling pitch or shyte bowling pitch, Kaspa aint gonna do better than Roberts or Garner. Gillespie would match em once in a blue moon.
McGrath and Warne would do very well indeed but so far its two vs four.
And you can play on the current day pitches if ya like. OZ would still get outgunned by the WI firepower. Remember- IND specifically prepared slow pitches for WI in the late 70s/80s and the WI pacers still scorched the scene.