I'm not familiar with ESD, but I will say this. You are absolutely right that not all people who dissociate have DID. However, the DSM does NOT have a diagnose called "DID not otherwise specified." There is an entirely category for classifiying various dissociative disorders, which includes: depersonalization disorder, dissociative amnesia, diss. fugue, DID, and dissociative disorder NOS. That is dissociative disorder, not dissociative IDENTITY disorder. That would cover disorders involving dissociation OTHER THAN DID and the other dissociative disorders.
btw, I disagree with those who've said those with DID should post in the personality place. DID has NOTHING to do with personality disorders.

-comfort the disturbed and disturb the comfortable-