How would an Assassin's Creed MMO work?

I've finally gotten around to playing some Black Flag in recent days, and while I'm not sure how I feel about the annualization of Ubisoft's Assassin's Creed series, I'm having a rowdy good time in number IV. As with most of the single-player games I sample in between MMOs, I end up thinking about how they'd work as MMOs, and it seems to me that AC's lore, sci-fi stylings, and various historical settings would translate easily.

I'm not sure about all of the mechanics, though. And that's where today's Daily Grind comes in! Do you think an Assassin's Creed MMO would work? Why or why not?

TH