A couple of historical and linguistic quirks for the reader's interest: the Elizabethan year began on Lady Day, in March, rather than January 1st. In result, Christopher Marlowe was, to his contemporaries, born at the end of 1563 and William Shakespeare at the beginning of 1564. To a modern eye, their birthdates would be in February and April (respectively) of the same year, 1564.
The author has chosen to preserve this quirk of the times, along with a characteristic bit of English in transition: at the time which the writing refers to, the familiar form of the English second-person familiar pronoun (thee) was falling out of use, but had not yet lost very much ground. As a result, current scholarly thinking holds that conversation between familiar friends showed a good deal of fluidity (as demonstrated in Shakespeare's writings), even switching forms within a single sentence.
She has not chosen to preserve the transitional forms of address for nobility that were in use at the time, under the belief that it would cause more confusion than it would be worth: instead, she has tried to limit formal forms of address to one per customer, for clarity of reading. Also, she has not chosen to preserve the peculiarly Elizabethan habit of broadening the verb conjugation normally reserved for second-person familiar to include the first and third persons, with the exception of sparing use in correspondence, etc. Sincere attempts have been made to preserve the flavor of Early Modern English while rendering it comprehensible to the modern eye and ear.
The author sincerely apologizes to any historical personages, the shades of whom she may have offended, by assigning them irrational political philosophies, to which they most likely did not subscribe in life. She considers this work to be a grand disservice to history, in the tradition of those two innovators, who brought the Fictionalized History into popularity in the English Language--
--and doesn't consider it necessary to be any more faithful to Kit and Will than they were to various British Sovereigns not of the Tudor persuasion.
Really, after Richard the Third, Will deserves whatever the Hell he gets.
She hopes they appreciate the irony, wherever they are.