Just SLF and trust the right decision was made in this situation
One thing I note is that in the discussions above that some do not understand conditional statistics. I suggest some posters read up on it.
Next, derived from this, a question: Is a 747 / 380 on two engines after a random initial failure and no diversion followed by a second random failure just as flyable, stable and 'safe' as a 777 on one engine (assuming for both no more engine failures) ? If not, then a drop from 3 to 2 on a 747 / 380 is more 'seious' than a drop from 2 to 1 on a 777.
Yet another question: To what extent is it possible to know fully and completely the cause of an engine failure before a mechanic opens up the engine?
If it is 100% possible in some situations, then in those situations the chance of a second failure is equal to the chance of the initial random failure.
If it is not possible to know 100%, then there must be assumed a greater risk of a second or further failure.
I know stats, but not piloting, so I do not have the full answers to these questions, but they are central to situations such as this.