I understand the frustration that the EHRC hasn't provided satisfaction with a more fulsome and frank explanation of the reasons behind severed ties with Stonewall.
However, this way is clever, and possibly more useful.
EHRC has provided a benign no-fault divorce template to all organisations. Allowing them to each 'review their budgets' and decide how better to get 'value for money'. This approach will likely result in more organisations making the break, than a self-flagellating mea culpa would.
It might be less satisfying, but it's probably more effective in achieving the overall aim. When Stonewall's protection racket is significantly weakened, then we'll start to see some stronger statements condemning them.
For now, let's see how those 'budget reviews' pan out.