They decided for a new transporter with completely new engines, a combination prone to trouble - unknown behavior of fuselage plus unknown engine vibrations - and they decided to trust consulting companies like the one UvdLeyen was raised from and they decided to leave details to engineers. They had all ingredients for a problem soup and they cooked it well. There is nothing surprising and if you look for the comments when the project started - many of them were right to the spot.
I doubt the contract will be cancelled, because of political pressure on all thrusters, but the finally have to play the alternatives card and purchase at least an interim fleet.