As for ETOPS "affects", they are typically based on reliability per flight which would be unaffected by a single "one-off" failure such as this.
Regulated containment is for common blade failures caused by the release of a single blade intentionally released in its attachment.
It has little to do with throwing bits into the engine and seeing where they go, once you get beyond the fan.
I would certainly not expect the subject event to be the result of a single blade release, although numerous blades may have been involved.
In cases of this magnitude the corrective action is more likely to be one of minimizing the cause of a multiple blade release.