What tools Valve provides to developers to curb harassment may or may not make some difference there, though the long-term cultural effects of course remain to be seen. Itch.io's creator also criticized the policy.
Developer Robert Yang, however, criticized the initial policy announcement, saying that the hands-off approach only emboldens reactionary currents among Steam users and developers, opening the door but not truly welcoming vulnerable creators. If Valve is consistent with its new policy, it may be of some relief to devs who want to make explicit or experimental work without worrying about whether or not they can be included on PC gaming's largest platform.
Negligee itself contains 'pressured sexual relationships' and 'themes related to abusive marriages' according to its developer's description, though not having played it I lack context for these elements. In a recent interview, Mark Antoon, president of adult games distributor Nutaku, criticized Valve for allowing House Party onto Steam, saying that Nutaku's team rejected the game for violating its rules by depicting blackmail. One point of concern is that Valve-whose history of moderation doesn't inspire a great deal of confidence-may not pay close attention to what kind of sexual content is being sold.