I don't think there is such a thing as too little too late, with this topic. Lots of people are on the side of "trans rights" because they are brainwashed and lied to, or just don't understand the issue because they still think trans people are rare and all post-op, for example. Lots of people are still not aware of the links to fetishism, the funding by big pharma, the homophobia, the predators taking advantage, the medical transing of kids just because they are gay or GNC, etc.
The more all this comes out, the more people will understand and make sense of it all and see why feminists (and increasingly LGB people, police, HCPs etc) have been saying what they have. The Guardian, if it's survived, is unlikely to be left behind in genderwoo land once most people understand what's been going on - especially under an eventual new editor. It's important for all media platforms to consider all the arguments, and be open to change.