Thinking outside the square here, why not just cheat?

If the wing incorporates a round wing joining tube (aluminium or carbon) why not let the wings pivot on the rod like all moving tailerons on a jet.

With the tube in a reasonable aerodynamic position very little servo muscle would be needed to raise & lower the trailing edge (1/4 inch up & down?) Any linkages could be hidden in the fuselage with perhaps a small slot near the trailing edge of the wing.

Rigging wires near the pivot would move very little so they could still provide some support. Others could be made elastic to allow for wing movement.

No wing warping, no ugly ailerons, just roll control. - John.