I take it that you are specifically attributing your assertion "Crammer's book of Common Prayer was pretty much just a translation of the Catholic Sarum Rite" to Adrian Fortescue, "The Mass: A Study of the Roman Liturgy?" 

Haven't read Fortescue in decades, but this notion strikes me as absurd. 

I challenge you to provide citations. The book is available on linefor easy electronic searching.

Ten minutes of my research revealed that, quite to the contrary, Fortescue expresses the view that the ordinary of the Sarum liturgy was essentially the ordinary of the Roman liturgy with a few variation in the order of things (in the second edition [1914] please see page 202ff.) More to the point, on page 205, footnote 1, Fortescue expresses the exact opposite view--the the reformed Anglican liturgy is not related to the Sarum rite, which had become wide spread in England just prior to the Protestant Reformation.