Dunno that we need much more experimentation, we all know what the outcome will be - Loads of sexual harassment and misogyny.
Also, the stastically correct way to “sound like a girl” is to mute and never speak up. Last time i read something on this topic, the gender balance in a lot of games is better than we think, but women overwhelmingly stay muted to avoid harassment.
The solution isnt more education/experimentation. Everyone who cares already knows what the problem is. Games need better moderation tools and clear community standards.