Now, I don't mind gender swaps like this cause, while based off a real person, is fictional and so is open to interpretation. Only when historical gender swaps that bothers me. ... Why they made him a overly boing boing Fubuki is... Something I don't care to look for because holy shit! BOING BOING FUBUKI!!
I am so lost on F/GO lore. Why is he a big tiddy cat girl now?
Because they were told to cut back on turning any random historical figure they drew from the hat this week as another Saber, so they rolled a 2d6 a couple times on the MAID RPG chart, and came up with fox ears, ribbons, and giant syringe... the big tiddies are just artist preference, though.