I don’t think only gender neutral bathrooms is the way to go. There should be an all gender bathroom and a woman’s bathroom. Unfortunately we live in a world where women may still feel understandably uncomfortable with men in the bathroom with them.
Note: To be clear I’m not saying the women’s bathroom should be for cis women only, it should only exclude men.
I might be wrong, but I think you still can’t use a ‘:’ in a filename in macOS. If I recall correctly it will let you do it and show it in Finder, but actually replace it with a ‘-’.