Were those costumes too revealing?

I suppose the only people who were particularly revealing in the original series were the women who got to wear lots of holes in their costume.

Gene never confused the sexes. People do, but Gene didn't. He loved women to look like women. He didn't think it was awful for a woman to be over a size two or to not look like a boy. He wanted his women to look like what he regarded as women who looked like, and he liked beautifully gowned women, and he reflected that and insisted on it.

You saw the little openings here, there, the cleavage there, they were dressed to the hilt with grey paint. They were still very sensuous wardrobes for women. Ambassadors came with flowing gowns and it was always very, very feminine.