The depiction of Mary I is interesting.
She fits the mould of the modern shoujo "villainess". Born with life long poor health, temperamental, in constant conflict with her father who reduced her mother and her to a lesser status, sent her to her half-sister household (Elizabeth grew up around Mary), wasn't allowed to see her mother even on her deathbed, in constant conflict with her much younger brother, the king until his death, fought for her throne and became queen despite seldom had training in governorship, ruled ineffectively for 4 years, locked in constant battle over her religious zeal, killed a lot of people over it, unable to have children, unable to dislodge her half-sister from succession. Died due to poor health, abandoned by her husband and lost the battle with her sister. She is a real "oh poor me", "villainess" figure, born into purple but still tragic.
Yet, she's depicted rather traditionally as a bitter villain, rather than a "modern" tragic one. Elizabeth is also depicted as mild and sympathetic, but she endured her sister's reign quite well while cunningly maintained a balance, navigating the religious schism in her land. Then, once ascended, her secret service, eliminated plots against her. Her being depicted as a more stereotypical, wide-eyed princess who matured is fine, though it seems a little traditional as well.
After Bara Ou, a more traditional approach to historical feels strange, again.