Airship:
Sadly I do not see much development in that direction. Fatigue analysis is (for metals) well covered in academia. However it is still a sort of a problem in aerospace no matter how long the topic is present.
Nobody can still claim it found "the" method for crack detection, propagation etc.
Same holds for different types of composites. In my opinion, largest problem would be that different OEMs have different approach to composites in terms of application, manufacturing and after EIS keeping it functional.
It seems that every new type introduced brings new suggested repairs and inspections. It was easier with metal due to its crystal structure which was easier to predict. Still metal fatigue do present a problem, at least in aerospace.
the whole point I would like to address is that we are just getting into an era with far more composite primary structure vehicles and we can see more incidents like this simply because it is the first time we use composites in such way.
A300 is a good example because it is more or less one of the first commercial programs with composites in the structure.
Let us wait and see what will come out of more advanced programs that came out latter.
In my opinion, the only way to be sure of the flaw is to have 10exp-9 size gauges embedded all over the structure and constantly monitored. We are years away from that.