the composite engineers have won the day and we are not going to see a metalcentric repair
Which dates even further back than this repair design. Composite engineers have already won in the design phase and the fuselage is no longer built from riveted (black metal) panels but the wound fibre design of the pressurized fuselage really takes benefit of the superior properties of composites. However, in an anisotropic material strengthened in only one direction (where the hoop stress dominates the laoding) may simply no longer have the bearing strength to do a metalcentric riveted repair. A scarf joint bonded repair may be the
only method to repair the wound fibre barrel. So now we get a "better" composite repair than in the past of transport aircraft (in fact we get exactly that type of repair which has alwys been done to wooden aircraft and has been done for composite gliders since the 60s) which may however take a little longer and cost a little more, but will ultimately give the much better results.
To be exact the prefabrication of "spare parts" in the original production mold and splicing that into the damaged airframe by a bonded repair is more the style of wooden aircraft repair, than that of composite gliders where you often build the "spare part" in situ with a special tooling mold, so that producing and bonding is a single step.
Finally we do not only get transport aircraft made from composites, but we really get composite aircraft...