The EK problem is a well known A380 problem, not a A330 one.
Then I'm afraid you don't know the A330 very well.
We had an A330 stuck at the holding point for two hours in my (european national) airline! The brakes would not release, no matter what they tried.
Its a well known gremlin, and Airbus recognise it by telling you not to arm the Autobrake before take off until the Flight Controls Check is done.