Where I live, there have long been single occupancy, floor to ceiling doors, hand basin inclusive loos, which are labelled 'unisex'. Most people know that unisex means, both sexes can use the loo, but not at the same time! Though I think unisex could be confusing to some, I think that this is broadly OK - it certainly alerts women that this is not a single sex loo.
What I object to, massively, is what they've done recently at my local library, which is put men's and women's facilities in the same room (men's down one side, women's down the others, no urinals), without any signage on the (heavy) door that this is the case.
I was incredibly uncomfortable the first time I walked in without a heads-up from signage - the loos are in a quiet corridor, away from the main part of the library, the door into the mixed sex loos' room is heavy, and blocks sound - I felt very vulnerable, especially as there were no other women entering the room. Honestly, I felt like there was an increased risk of assault from a male in this room, and the fact that each loo was self-enclosed actually made the risk worse - if I'd been dragging into one of them, I'd have had three heavy, floor to ceiling doors AND a corridor between me and anyone who could hear what was happening.
I won't use the library loos anymore. But for other women and children's sakes, I've written to the library asking that the sign on the door be changed from 'Toilets' to 'Mixed-Sex Toilets', so women can avoid the facilities if they prefer. Haven't yet heard back. I doubt they will change the signs.