Remember that the new c/s was unveiled at the A380 rollout. At this event, the A380 itself was in the center and the new c/s only had the task to decorate it.
Remember furthermore that the most spectacular thing with the A380 is the enormous fuselage, and the Dreamliner c/s optically dissolves the fuselage shape with the waved line. Finally, the plane had to look serious and trustworthy.
I do agree the new c/s is a little bit boring and needs more colors, although I like it. The point is only, at this moment they need a conservative c/s and not a crazy one.