having the project in XML is a request we get once in a while. We did extensive research to get an XML format working for V2, however due to the nature of the object structure, it would became a large file with refernce tags to other tags like the SOAP formatter outputs. This means that versioning on the file itself would be impossible (no way you're going to update parts manually as everything is related to eachother). This is partly caused by the fact that the schema meta-data is part of the project, so it's not just mapping data, but also the schema data.
As we wouldn't be able to fulfill the goal for the XML output, versioning in XML, we didn't proceed further.
