Gang warfare may be a different take, but it's hardly an interesting take. And besides, it's not like we're swimming in games with Victorian London as a setting. I'm not proposing the entire game to be set in White Chapel, I just like that dark and mysterious mood, and I'm sure it could be used properly without feeling like a total cliche. Thought they did a good job in Black Flag with the pirates, they managed to hit the right balance between grounded and outlandish.
As for the rest, not a single thing in any of the showings so far doesn't look half as impressive as Versailles interior or a crowd of people like the one in front of Notre Dame. Don't know of any AI improvements, having opposing factions fight is hardly a new thing in the series, and same goes for a day/night cycle. Even that zip line mechanic was already present in Revelations to some extent, here they just decided to expand it by ripping it straight out of Arkham games. Traffic "system" is the only thing I can give you, but that hardly covers the fact most of the city looks empty, which is a drastic downgrade from Unity. The only places which seem properly crowded are the train stations, but even that is a far cry from a proper Unity crowd. It's hard to accept a downgrade when the series itself has already shown you it can do much better.
