I really don't know how QF and EK are going to plan their routes together, but how it looks like from Northern Summer 2013 doesn't look promising.
1. The EK flights from BNE, PER and ADL don't connect well to the QF flights to LHR at DXB. (Well maybe the third daily EK flight from PER would). The transit time to most European destinations would be 4-8 hours, except for FRA and LHR which QF flies to now anyway!
2. The retimed Singapore flights - seriously the MEL one arrives past 7pm and the SYD morning flight arrives in SIN at 4pm. Which Jetstar Asia flights would they connect to seamlessly in both directions? Phuket and Ho Chi Minh City. Both of which are served by Jetstar Australia in their own right from Sydney anyway. (By the way, that's only for the QF SYDSIN 940am flight. BNE, ADL and MEL won't connect to Jetstar Asia comfortably in both directions, except for Phuket
So QF has effectively diluted their single hub into two hubs, both of which really don't get connections comfortably in both directions.
If the current QF Europe flights ex SIN get feed from 7 Australian cities, and the new flights ex DXB will get feed from just 2 (and PER maybe with the new EK flight) where's the rest of the feed coming from?!