Perhaps nurses would be a better pool of astronaut candidates than test pilots.
I remember seeing a Russian space toilet when they had it set up in the powerhouse museum in Sydney. It looked like a booth with a vaguely pubic area shaped vacuum attachment designed to be unisex. I stared at it for some time trying to work out how it worked. The Apollo system seems horrendous!
I'd take it over chasing a floating turd around and cleaning up the mess all over the walls.
Honestly replacing gravity with negative air pressure might have been the ideal solution
But I know that air is also a limited resource on space so it can't be solely an "airline-like system"
(Also discarding it "outdoors" might be the best solution in the end)
IIRC from the book " packing for mars" the American man astronauts begged NASA to provide them with diapers at some point, which is what women astronauts got, because the earlier male-only system was a sort of sucking condom which was incredibly bad.