Regarding this discovery, I would argue that debates about the quality of the KJV translation are beside the point. This is a tremendous historical discovery, especially for historians of the early English Reformation. The KJV formed the mind of British Christianity for centuries, which in turn formed the mind of the British Empire. In other words, the KJV translation is important not merely for early Reformation studies, but for world history more generally. Anything that could give historians greater insight into the process of the KJV translation, as well as the theology (theologies?) of its translators, is a great discovery.

(A side-note regarding the Empire and Christianization: in the early centuries of the Empire, the British were primarily interested in trade and conquest, but not so much in evangelization and conversion of native peoples. The East India Company (EIC) was a good example of this: as long as profits and goods flowed in from India, the leaders of the EIC were content not only to leave native religions alone, but even to intermarry with native Muslims and Hindus and allow each wife to raise her children in her own particular faith tradition. Hence the creation of a new ethnicity: the Anglo-Indian. However, in the 19th century, an evangelical revival effected a sea-change in British Christianity, and thus the Empire became a vast instrument of evangelization and conversion. At this point, I think, the KJV became important for world history, rather than British history in particular.)