So I added the SOAP structure to the message and then went field by field to see what was breaking the transform. The problem seems to be that after the transform that removes the escapes, there are SOAP namespaces on the Envelope and Body notes. If I removed these, it at least passes in message map test. But, now I have to find a way to strip these out of the data or include them in the DT's schema.
<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:Encoding="http://schemas.xmlsoap.org/soap/encoding/">
<SOAP-ENV:Body>
<ns0:ExportDataResponse xmlns:ns0="http://isbdcapp86/Enablon7.8Train/rpc_literal.wsdl">
<Data xmlns:enab="enablon">
<Document>