I think SEID would have been the better choice if we could start over. History will probably limit its uptake, however. CFS is terrible, but ME has different problems — particularly as we don't know what the pathology is and ME implies the pathology. Neuroinflammation may well be a part (and I think it is) but I expect it to be downstream. ME is also hopeless as a search target, and as has also been pointed out before, the BPS / denialists retort with "everyone, look at ME", as if people were simply craving special attention.
I think if SEID isn't to be adopted, then ME/CFS should continue to be the placeholder name. The name can be replaced with a proper term, once the disease has been worked out.
(The optimist in me continues to believe that the large LC numbers will shine a much-needed light on all of this, and I expect the answers to have ramifications throughout our understanding of many diseases, as well as what have been thought to be or not be diseases).