@neweimear - I'm afraid there is always going to be divided opinion about all of the ME specialists and their treatment approaches since we don't have any solid evidence yet for the majority of the interventions.
However just because there are not published studies we cannot ignore the years of clinical experience that these doctors have - the likes of Peterson, Klimas, Montoya and KDM etc. KDM co-authored the International Consensus Criteria for ME so he is in no way a 'crook' and is respected by ME professionals alike.
If there isn't evidence to disprove his theories and treatment approaches then I do not feel anyone can say he is completely wrong, unless it goes against all of the principles of basic science of course. In which case it has been highlighted by people on here who may be more knowledgeable in those particular areas. The only people who can form a true opinion are the patients themselves based on their prior experiences.
Many people have been helped by KDM. An independent review of his work found approximately 70% of people improved, 20% stayed the same and 10% got worse. Unfortunately there are some people on here that have been made worse. There is always a risk with all treatment. Therefore a risk vs benefit decision must be made.
I have personally been helped massively by KDM. I've had years of IBS to have recently discovered I have severe fructose intolerance amongst many other problems. Something the NHS either hasn't got the resources or care to identify. I found considerable benefit from reducing my consumption of this. This finding is of course unique to me and is a tiny aspect to the general work up that KDM does. It may or may not be connected to ME however it certainly does predispose to gut dysbiosis which is starting to be linked to the pathophysiology in ME by several research groups. I've just used this as an example of one of the many benefits I have already experienced with his treatment.
So I would suggest you make your own informed decision. Maybe wait for your treatment protocol and you will be in a better position to critique it. KDM has been flexible in his approach with others so I'm sure he'll be happy to discuss your concerns/thoughts at the next consultation.