I am glad that sensible discussions are being had, but surely the fairest thing is if everyone competes in the correct category for their sex, keeping in mind pre trans rules.
If that means that people with trans identities cannot compete at the level they would like, I'm afraid that is a disappointment they will just have to swallow - we all have things we would like to do but can't. It will never be fair for TW to compete against women (or TM with raised testosterone against women, I'd imagine). Women will always be the group that is disadvantaged.