More specifically, showing your characters without helmets in personnel screen, with the helmet placed on a "floating surface" or similar prop right next to them. And with a toggle (like the existing "helmet off"), make them wear the helmet.

This way you can more easily remember their actual appearance, which is often forgotten after applying a helmet up until having them in the memorial.

Additionally, make it so head cyber augmentations don't replace heads, but work as helmets. Give the actual heads a cyber-ed appearance, which like mount points added to cheeks and neck to "install" the helmet during operations, instead of canonizing we're cutting necks out here.