...in practice the current guideline says patients should make a fully informed choice about GET/CBT, and further treatment and support should not depend on compliance etc etc. And that GET/CBT are only evidenced for mild/moderate cases.
But mild and moderate cases of what? While its true that studies like PACE included some patients who experience PEM, GET and CBT were never evaluated in studies using definitions that require these hallmark criteria. And in PACE's reported pool of improvers, how many were just Oxford CFS = chronic fatigue. Even if those reports of improvement were valid, which they are not, I dont think there's any evidence that CBT and GET help people accurately diagnosed with ME.
So a good ME/CFS guideline could cover her needs as well. It would list other fatiguing conditions that need to be tested for, like hypothyroid, anaemia etc., and recommend consultant level investigation for those sufficiently disabled by their fatigue as to lose significant levels of functioning.
I agree that a good guideline for ME needs to include a differential diagnosis for other conditions that can cause similar symptoms - and not just fatigue. But a guideline that is written to cover both the diagnosis and management of all medically unexplained fatiguing conditions would either need to make generic recommendations that help no one and may harm or have much more detail about diagnosis and management of each of the different types of fatiguing presentations. If such a guideline were to be written, I personally think it would be a mistake to label it as an ME guideline as not everyone covered by that guideline would have ME