I still say they could have had a slam dunk with Nobunaga being a Templar thanks to his Jesuit connections and desire to bring order to Japan no matter what
Shitlibs are retards at the best of times, but the way they consistently refuse to explore the order/freedom dynamic of the two factions is among the biggest fumbles of the franchise. They don't do so, naturally, because they are ideologically captivated and have pigeonholed Templars as the "bad guys", slapping the red cross on any historical figure they don't like.
Since they're mental midgets, they are incapable of taking things to their logical extreme and imaging what a society built on the idea of "nothing is true, everything is permitted" would look like.
Sure, you have Rogue, but that is basically just a reverse of the usual AssCreed story - the Assassins are now the dumb villains, and the Templars the reasonable good guys.
A more fun, and actually novel, take would have been to play as two protagonists - a Templar samurai out to avenge Nobunaga, and to ensure his dream of a unified Japan came to fruition, and an Assassin ninja attempting to sabotage the Templar plot, and then use that to explore the differing philosophies and ramifications of their beliefs.
Even the White Wolf cuck writers eventually conceded that turning every human into a walking magical nuke that can rape reality at will might not be the best idea, and that the Technocracy (the faction that wants to keep humans away from their magical potential) has a point.
not even the Japanese themselves particularly like Oda Nobunaga, what with giving him the moniker of "Demon King" for his sheer excessive brutality, even by the standards of the time
It's not so clear cut, though. Some writers depict him as a tyrannical butcher, a literal "Demon King" as you, while others take a more nuanced approach and present him as the first of the great unifiers of Japan, the one that set events in motion that would lead to the end of the Sengoku Jidai and the unification of Japan.