I just can't see that happening RH. For a start, it will mean that JON has to admit his hand-picked candidate was a failure, and therefore, his selection was wrong. Snowballs in hell and flying pigs leap to mind.
Secondly, we are a year out from the RWC. While I appreciate Link turned things around in QLD within a year, doing the same for the Wobs is far more problematic. Say Link comes in in December. The Wobs will have disbanded back to thier regional camps for S15 pre-season. S15 runs to end May. This leaves Link June - September to completely overhaul not only the squad, but the methodology that RD has embeded over 3 seasons. Don't forget, Link has nil national head coaching experience. RD now has 3 years worth. RD's pedigree is better to date, simple as that.
End result with Link? The Wobs will probably do very poorly at the RWC.
Keep RD, and we may still do poorly at the RWC, but then again, we may not. The odds are better maintaining the status quo.
The other point you make is that there will be enormous pressure on the ARU. Pressure from who? The journos are toothless and prone to tow the line; the fans will still turn up to games because we are hopeful the turnaround will strat to show signs of life; ex-Wallabies will bleat a bit but who listens to ex-players anyway? And who within the ARU will go toe to toe with JON to demand change? QLD? NSW? That's a laugh; they are a bigger boys club than the Hitler Youth.
Intriguing speculation, is it not?
With a shocker of a 2010 3N behind us and, say, loss also of the BC, JO'N's rationale for holding RD through to the RWC (or anything else) is then hanging by a tiny thread. The 'long-term development and youth' line will be hugely worn down. RD will have nearly completed 3 full seasons. The up-to-now docile rugby media will at last be questioning Deans (how could they not?). The ex-player brigade will likely then be on the bandwagon. (And even Gagger might be writing to the Prime Minister noting a change of mind (;-)). Remember, just this week JO'N stated that we wanted to see 3N silverware this year and a 70% w-l ratio (he dusted that goal off from last year).
JO'N is a business pragmatist above all else (and a good one). IF RD was to be saved for the RWC and things went badly there, scaling from the RWC 2007 loss, this 2008-11 period under RD would be a genuine disaster for the ARU. There would surely be calls for top heads to roll at the ARU in that final, awful eventuality.
But a new coach in say September/October 2010 (which is when the change would happen, if it did) could refresh everything, immediately change elements of the team, and perhaps rebuild much more credible hope for 2011-13. JO'N would have to admit an error, but there would also be gilded excuses re injuries, need to improve Australian player depth, great new talent arriving, etc. And JO'N will (rightly) be betting that the 2011 S15 year could be a very good one for Australian rugby and our S15 teams with some timely good glow for him/ARU coming from that.
So, IMO daz, the overall calculus is complicated. Your points are valid too. But I stand by my assessment above (for now).