I don't think its a good idea. I don't see the appeal of a male inclusive women's space. The rules are what make this community what it is. I doubt I would ever visit the new community. I hear men's unsolicited takes on women far more than I'd like, despite my best efforts. No way I visit a community for more of that.
Women will be at the real womensstuff, men will be at the male inclusive one. It will become a place for men to talk to other men about women. I don't think that's the kind of vibe we should encourage. I also don't see how a space for men to be ignored by women is in any way valuable to them.
I think it would be much better to make a women adjacent community, that is male inclusive, and has its own focus. A male inclusive version of womensstuff is not the way to go.