Consider this a surprise...
DTM has announced the release of the "upgraded" Nebulon-B2 Frigate (AKA the Nebulon-B Mk. 2). A screenshot has been posted on the XWA Upgrade Project front page
and there's a link to the release thread in the news item if you want to leave comments. For now, you may download the Neb-B2 from DTM's site
, and it should be available for download soon from the XWA Upgrade Project site itself.