I do find it funny though that people say "It's an adult game, we want women in plate bikinis."

I don't associate gratuitous T&A with being an adult. I associate it with being a teenager. Not just because of the thirst, but also because there's a general idea among teens that somehow adding nudity and ultraviolence makes things somehow "grown up."

I tend to think that an "adult game" would have frank nudity, but also wouldn't treat female characters as eye candy, instead recognizing them as (fictional) independent beings with their own feelings and agency.