How do all those organisations feel now, having worked their arse off to go up the index possibly in the teeth of internal opposition, only to find that stuff they've been doing is now no longer part of the criteria and won't advance them?
The problem is, it's typically the LGBT employee networks and HR diversity leads who work directly with Stonewall and push their messaging and policy requirements across organisations - the only way to get organisations to see the problem is for service users/customers to speak up where it affects them and for employees to speak up to their line managers where it affects them.
HR/LGBT networks are in their own little bubble and generally filter out criticism of Stonewall, Mermaids, etc as transphobic, so they won't be reading news articles and considering reputational/legal risk.
Plus, most LGBT employee networks are run by/mainly serve gay men, who have no idea as to what women's perspectives might be on sex-based issues. There's also a lot of misogyny that goes unnoticed in these circles (as they're dominated by men), so the sexism that goes hand-in-hand with gender ideology also goes unnoticed and is not seen as problematic, as it's generally not as problematic to men.
It's only through people outside of these LGBT networks speaking up to other managers that organisations are going to see the issues, as the people in Stonewall's pockets are too blinkered to see any issue or risk still.