the useful thing about ME is that it's listed with WHO
the useful thing about CFS is that it connects to the recent biomedical research (and I'm certain this is the logic behind the use of ME/CFS by those groups who are for us), however it also carries a lot of negative baggage and irrational connotations/implied meanings
there's no reason for us to listen to wessely school on any account. they have no decent science anywhere, only a bully pulpit. they would use any name applied to this disease group. their goal is to keep alive the defunct (bio)psychosocial model, and psychiatry is rapidly losing ground to biomedicine (even traditionally psychiatric diseases like bipolar disease are now being discovered to be biomedical). hence the bloom of (bio)psychosocial theories everywhere. insurance companies are only too happy to help. however it will all implode sooner or later when they find it really doesn't help as much as actually treating the sick patients (CBT in the form of, say, sleep hygiene, does help the not-sick consumers to sleep better, etc.)
I think a totally new name would be good, which incorporates both the immune and the neurological findings, especially since ME has been unfairly mocked along with CFS (especially in the UK).