Yeah DID is a dumpster fire. It's a consulting company's dream spec. Anything is possible but almost nothing is required. It smells a bit like SAML all over again, wherein they try to satisfy every stakeholder and end up satisfying none.
To be fair, SAML was a victory at the time - in that they could even get the parties involved to agree to come to the table and write specs and agree to implement them.
IMHO, such consensus work improved in quality for a while after the WS-* dumpster fire was put out by JSON.
