Doubling the energy reach of the LHC by upgrading magnets with niobium-tin technology challenges optics design in several aspects. The machine layout and transverse dimensions have to fit in the existing tunnel. The larger energy swing together with features from the new niobium-tin technology deteriorate magnetic field quality, affecting both the linear and non-linear beam dynamics. A large number of design parameters has been explored in order to find optimal solutions. This presentation gives an overview of the optics design standpoint and next steps.