Not 'kinda'. Debris exiting the engine housing with sufficient energy and in a direction that leads to damage of other systems is the literal definition of an

Not 'kinda'. Debris exiting the engine housing with sufficient energy and in a direction that leads to damage of other systems is the literal definition of an unconfined engine failure (i.e. it can spit as many parts as it wants to out the exhaust). There is a band of armour around the plane of the fans that should prevent any blades leaving the engine perpendicularly. If there was fuselage or wing damage from debris, that was an unconfined failure and would require investigation as a major fault. However, loss of the shroud doesn't necessarily imply there was a confinement failure. Damage to the shroud during the event can easily lead to the cowling shedding aerodynamically, which is also part of the design: the last thing you need is more drag on the dead engine side. We can't tell which that was in this case, but it's important that we do---the design criteria specifying that the aircraft can be safely recovered from a catastrophic single engine failure during any stage of flight would assume the failure is confined to the engine.