Joey Slotnick, in the present production, does better as Semyonovich. Even so, the 2007 London production of Dying for It apparently got an enormous lift from the actor in the role, which does not happen here.
I am partial to the Christopher Marlowe authorship school, not because of any factual basis, but because I think it makes the best story. If you're going for fictional intrigue, I say, choose the best fiction.
Notwithstanding Colin Firth's astonishing performance, the film's genius lies in its being decidedly old-fashioned. Here is a sampling of my favorite titles which concern the venerable throne of England.