If the aircraft suffered from an uncommanded fuel dump, then the implications for ETOPS aren't so severe.
However the nature of the fuel loss has yet to be explained. There were also initially rumours of large amounts of fuel on the runway which might indicate fuel starvation rather than loss. Obviously the facts aren't all in, but when a twin engined aircraft losed both engines in flight ostensibly due to different and possibly unrelated faults (i.e. inflight shut due to low oil pressure and fuel starvation) then that's enough to give me the heebies. I think it's fair to say that only accountants really liked ETOPS to begin with.
On another issue, how did they power their electrical and hydraulic systems in the descent? Would they have needed the APU? If so then there obviously was some fuel left in the airplane to run it.