I tend to agree. To lose, within the space of four years:
Hayden
Langer
Martyn
Waugh
Gilchrist
McGrath
Gillespie
Lee
Warne
Will leave any side a lot poorer. To lose the coaches who had made them so great at the same time is also going to hurt a lot.
After the ashes, provided we lose, I would like to see Hughes and Khawaja replacing Katich and North and Copeland, Cameron and O'Keefe blooded as soon as is possible. I do not think that Harris is a long term option (though I do think he deserves to keep his spot as long as he remains injury free) and of the other quicks only Bollinger has done enough to warrant a guaranteed spot (and depending on how the Ashes turn out, this may change). No free passes should be given to any player over the age of 30 - if you don't perform you are out. I would also like to see Ponting drop down to bat at #5 or #6.
I also do not believe that Clarke is up to captaining the Australian cricket team. The problem is that of the current lot, I can't really see any of them doing a great job. Katich is too old, Watson has enough on his plate and doesn't have the right temperament. Clarke is too weak of a personality. Hussey has proven he's not up to the job. North needs to be dropped regardless. Haddin is a possibility. None of the bowlers have a good enough cricketing brain.
It may be that an intermediate option for captaincy might be Haddin, which could mean putting the gloves away just to focus on batting and captaincy. Which means he'd be holding a specialist middle order spot (which I think he's good enough to do).
After the exodus after the 06/07 Ashes series, I really feel like Ponting did not make great captaincy decisions. He should have pressured the selectors to give him a young team full of potential, instead of an old team of "not quite good enough to make the first XI when the great players were there". The incapability of making the difficult decisions a few years ago has left us in the spot we are in now - the only blooded players are tired and old and just are not of the same quality as the players of a few years ago. This is in stark contrast to what happened after the exodus of the Chappell brothers and Lillee and Thomo. There was Border and Boon and noone else in the team at the time was experienced. It hurt for a few years but it built the foundation for Australia's world dominance. At the moment our selections seem in disarray, without a plan for what the team will look like in three years time.
Honestly, who can see any of Katich, Hussey, North, Bollinger, Harris, Doherty or Ponting being around in four years time for the next home Ashes? At best, of the current team we will have a past-30 Watson, a 39 year old Ponting, Clarke, a near retirement Haddin, maybe Siddle and perhaps one of either Bollinger or Johnson (outside chance for either really as they'll both be on the wrong side of 32). I dare say that if we are relying on the bulk of our current bowling attack in 4 years time we will be thrashed. If we are relying on North, Ponting and Hussey/Katich we might as well just leave the Urn in England.
Rebuilding must begin the day after the Ashes end.