My casual observation is that there is really no major consequences for Australia doing poorly in Asia.
They lost 4-0 in India....They got rid ok Mickey Arthur
They lost 2-0 against Pakistan, nothing happened. (well not nothing, there was talk of giving additional points to Sheffield Shield teams batting out 100 overs)
They've lost 3-0 to Sri Lanka and it seems like nothing will happen.
Lehman has been confirmed as coach till 2019. A cursory look at the news commentary tells you that some of the guys who were left out for the third test will be back against South Africa....and then some thinking about taking 3 spinners to India. You would be forgiven for thinking that unless it happens in India for the cricket administrators it doesn't really matter).
You cannot fault this mindset to an extent because (a) as long as Australia can come out on top against traditional pace reliant teams (south Africa, England, New Zealand) at home or away and as long as (b) they win at home there really is no point of thinking of spin bowling as a key requirement of the game whether batting or bowling.
Take the contrast of England right now who have lost to Pakistan: there is much made of the fact that England need to manufacture a spinner and spin competent batsmen because England lost a couple of matches. You would not have heard any of this talk if England had won this series. In fact after Old Trafford, Athers and Hussain commented that hopefully the groundsmen understand the message that for England to win they need bouncy pitches with minimal lateral movement. Of course that turned out to be the wrong conclusion because the Oval pitch had even more bounce than Old Trafford.
Which brings me to point about the Pakistan tour to Australia. Other than correcting an abysmal record, they can ensure that CA has to front up to deficiencies that can be swept under the carpet as something that "happens when we tour Asia"
Of course that's a big if. but one thing is for sure, having watched the dismissals of Australian batsmen to straight deliveries, Yasir Shah is in for a good time. But for that, his batsmen need to shake off their generational deficiencies on Australian wickets.