I have blogged on how to turn on the logging for this utility.
http://blogs.msdn.com/b/jason_howell/archive/2012/09/13/enabling-logging-to-troubleshoot-mdsmodeldeploy-exe.aspx
There is a configuration file which you can edit to enable the text output, and turn up the logging to the ALL level to see full context of the failure.
"C:\Program Files\Microsoft SQL Server\110\Master Data Services\Configuration\MDSModelDeploy.exe.config"
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