So what can be middle ground that allows the OP's original 4 questions to be answered?
To me, this question is like asking 'what is the middle ground between anti-vaxxers and medical evidence for vaccination'. Or 'what is the middle ground between 99% of scientists and climate change deniers.'
What the 'personal freedom at all costs for one group in society' crowd are arguing is extreme. They are extremists. Look back over this thread and see the number of times they've acknowledged natal women's needs, and tried to come up with solutions that are fair to natal women.
The only ''middle path' I've heard from the 'other side' is the one that makes a distinction between males who haven't had surgery on their penis and testicles, and those who have, with those who have being presented to us as the 'safe transsexuals'. Still socialised as blokes though. Still feel entitled to the very few female specific spaces that exist.
A very, very few transsexuals are attempting to live with integrity towards themselves and others, acknowledging their male bodies and male socialization, and as part of that acknowledgement, not feeling entitled to the very few female-only spaces and resources. They live 'as women' otherwise.
To me, that's the only actual middle path, and you can't legislate integrity, more's the pity.
Ironically, the trans males who have made a decision not to invade female spaces are the kind of trans males who pose the least risk to our safety, privacy and dignity.
Anyhow, this conversation - where plenty of people offered suggestions for meeting both needs, and all were shot down as 'offensive', 'utopian', 'uneccessary' - just further proves to me there will be no middle path.
Because we already had one, and it was rejected.
Instead there will be a winning group, and a losing group. I am pretty sure that women will be the losers. No-one will notice. The women who don't care about sharing their spaces will continue to have a public life. The women who do care will have less of one. We won't hear from female prisoners, or from women in refuges. And the media will continue to fail in it's job of presenting both sides of a story, so the only narrative most people will hear is the triumphalist one of the genderists.