I think once we get new customization options for our characters, it would be great to see some comsetics based on the alien life: perhaps we could give our characters fins or gills, or some sort of shell pieces or horns. Another addition to that could be different kinds of skin colors and types based on the look of alien lifeforms (i.e. having blue striped skin like a marrowbreach) as well as different kinds of eyes. This could extend to biomods, perhaps when we scan creatures for biomods we could unlock cosmetics related to them (i.e. we could unlock a sonar or tentacles for scanning the collector), this could truly allow us to make our characters look changed and adapted to the life on the alien planet.