Haven't read it all, or all of this thread, but I think the name is a step forward, on balance.
Although I dislike the word intollerance because it doesn't sound that serious, it is clearly very linked with the previous word, Exercise and that is an absolute disaster for those promoting GET. The new name says that patient's can't tollerate exercise, it's aimed at them, and thus the idea of a treatment involving exercise is a bad idea. I also like the acknowledgement that it is a systemic disease, we haven't just got fatigue in muscles. I'm surprised by the word Disease being present. But it is welcome and ought to be helpful.
It's about time that the psychobabble nonesense DIES a death so let's hope SEID helps that happen. They won't go down without a fight though. They will find new angles and if the UK accepts the new label, which I think they will have to eventually, they will do all they can to get on the panels of people implementing any associated changes. Our job in the UK is to stand against that, this report supports patient's long-held views that psyciatry has no place in our disease, so let's not let them try and corrupt what could be positive change.
EDIT: Simon et al endorsing the report is exactly what I expect. Their aim at damage limitation will be for the name to change while everything else stays the same. In public they will be seen to be offering no resistance, rather helping things on their way. But they want to manage the situation, they have a lot of money to lose from this if they don't. They will say that they have been calling for this for a long time, that it is a great step forward and that they are pleased to see the IOM agreeing with them that exercise is a big problem in the disease and that they have a lot of knowledge and experience in that area and look forward to a renewed interest in helping these patients regain their tollerance to exercise.