Long time since it was a topic, but my recollection is that for a bonded joint, the insertion of mechanical fasteners reduces the effectiveness of the adhesive bond. The fasteners provide component keying for alignment, but that is possible by keyways in the components. The addition of mechanical fasteners would presumably localise stresses from imperfections in the mating surfaces which could be removed by a bedding epoxy fill as is done in moldless fabrication. Curious. Re A380.... the demise of the fleet removes the question as to how long it will take to have GLARE compromised by interstitial corrosion events. The material is dependent on keeping moisture out from the fastener holes through the multilayered material.