1) re the change from km to miles..sorry to be a cynic, but I remain to be convinced that it is anything other than a ploy to make it hard to compare the old system with the new, and to conceal the fact that behind all the hype, it's a pretty ordinary deal for the majority of people.

2) one real horror story which hasn't had much comment so far is the treatment of BC pax (FC too, but that's academic for me!).
In the current scheme, BC pax got about 80% more points than discount economy; BC reward flights cost 25% (dom) or 50% (int) more points. In the new scheme, BC gets only 25% more points; BC flights cost 50-100% more! THIS STINKS! It is surely the worst treatment of BC pax by any FF scheme anywhere! (The US airlines are a bit ordinary in this regard, but nowhere near as bad as this). Is this considered the way to treat high-value customers? Myself (current Silver) I will get 12% less points for BC flights under the new scheme...thanks a lot!
C'mon Qantas, get real..if you are going to give 100% for discount, then give 140% for full-economy, 180% for BC and 200% for FC (say). We aren't talking vast numbers of people..and they're the ones who make your profits!