Old Engineer...
The situation of problems in a newly designed engine essential for an newly introduced airframe has occurred before. We have to go back about 40 years. It is the 747 and its PW engine. The details are in "Wide-Body ... The Triumph of the 747", by Clive Irving, publisher Morrow, 1992. You'd want to look in Ch 17, "The Ink and Iced Water Men."
The Trent engines powering the A380 however are NOT new engines, they are newer iterations of the RB211 which was a product of the late 1960's
The Trent engines have been around since 1990.
In other news, methinks legions of barristers, probably more than enough to sort thru multiple cascading serious legal issues (that number is 2
) are lining along the trough for a feeding frenzy.