The FACET accelerator facility is designed to provide short and intense e- or e+ bunches with small spot size for plasma wakefield accelerator research and other experiments. It is based on the SLAC linac with a compressor chicane in Sector-10, and a second compressor chicane and final focus in Sector-20 (S20). Originally, the S20 chicane was designed to be compatible with an upgrade to include a second S20 chicane for simultaneous transport of e- and e+ bunches. This placed additional optics constraints which led to strong focusing in the S20 chicane. This increased the effects of errors, causing emittance growth. Lately, it has been decided not to proceed with the upgrade option. Therefore, there is the potential for improving the optics by relaxing the constraints. In this study, we explore alternative optics designs where Beta functions in the S20 chicane and final focus are reduced in order to minimize the error effects. The optics and non-linear aberrations are evaluated, and the chromatic correction is optimized for each design. Beam tracking simulations are performed using elegant. The most optimal designs are identified based on these simulations. Show Partial Abstract