No one is erasing bisexuals, Transmum, it's just that it's irrelevant to our discussion. What's important to women being asked to share sex-segregated space with transwomen is that many/most transwomen are sexually interested in women. It doesn't matter to us if they're also attracted to men. I understand a lot of AGP transwomen are bisexual, for fairly obvious reasons. They start off as straight cross-dressers, often married with kids, and then - post transition - see having sex with men as a powerful endorsement of their "womanhood". You see it discussed on r/asktransgender all the time.
Transwomen are, on average, taller, heavier, and very much stronger than women, and they, like other males, pose a potential physical and sexual threat to women, and at the same rate. That's why it matters to us. There's an absurd claim I've seen in far too many places that transwomen never commit sex or violent crimes against women, which is all too easy to disprove. When you write "I feel the bathroom debate is massively overplayed and is blatant fear mongering" you are erasing all the rapes and murders committed by transwomen, as well as all the smaller crimes: voyeurism, filming, using our possessions for the purpose of masturbation.
Of course, most transwomen - like most other males - are gentle souls who wouldn't hurt a fly, but the ones who will won't have it tattooed on their forehead. That's one of the reasons we have sex-segregated facilities in the first place. And when you say "There must be a balance between protecting women and giving them safe spaces and allowing trans women access to those spaces," I, and other feminists would disagree. Transwomen who pass doubtless use women-only spaces, and we wouldn't notice but, as a principle, no, males should not be in women's safe spaces regardless of how they identify. Very few transwomen do pass more than casual scrutiny, so there's that.
I was interested in your statement "I'm pansexual, which means I'm attracted to all genders." I haven't come across the concept of being attracted to a gender and find it hard to get my head round. I imagine you're sure you don't mean sex? People are normally attracted to a sex, i.e. lesbians are attracted to other women, not to gendered performance. Indeed a lot of those attracted to their own sex don't do gender much.
I'm not suggesting for a moment that you do this, but the argument I've seen from transactivists sexually attracted to women is that because lesbians are women who are sexually attracted to women they must therefore be open to relationships with anyone who adopts feminine gender roles regardless of their biological sex. Which is homophobic nonsense. But I would be interested to hear more on being attracted to all genders.
Sorry I'm asking questions on old posts, but I've not been at a proper keyboard for awhile, so couldn't cut n paste.