Too little too late.
Connor's superpowers make no sense. Thankful as I am for the ability to zoom across the city (it's not like there is anything worth exploring or looking at, anyway), or to use a shockwave attack, those staples of the 3rd person action genre simply don't belong in Assassin's Creed. What is fun in Arkham City or Devil May Cry, feels like jumping the shark here. Neither Altair nor Ezio required such gimmicks to hold the player's interest. They were ordinary men, if very capable, and that was fun, because it made it all more real, I guess. When they did use supernatural powers, those came from the Apple, and such occasions were very rare, which was what made them cool (and even so, it felt a bit too protracted in Brotherhood). Superpowers that don't come from a Piece of Eden simply don't make sense in the AC universe. Magic berries? Come on.
The story makes no sense. Washington has convinced the people to build an architectural wonder in his honor in the middle of a freaking war, and we're supposed to believe that they will rise up against him just because some weirdo in a wolfskin blows up a couple of monuments and strings up a few soldiers? They'd be a lot more likely to lynch the weirdo. And then Washington confesses that he had no idea the Apple could control people in the first place, which goes against everything we've seen. Was the Apple controlling everyone of its own accord, then? Again, this contradicts everything we know about it. On the plus side, the story is pretty straightforward, apart from those inconsistencies, and you'll have no trouble following it.
The pyramid is pretty awesome, the improbability of its existence notwithstanding. When I was inside it, I felt, for the first time in "Connor mode", like I was actually playing Assassin's Creed. Exploring and fighting your way through a marvel of architecture laced with ancient mysteries, that's what Assassin's Creed is about. Unfortunately, it's too little too late. Too little to offset the incoherent story and out-of-place abilities, too late to salvage the franchise.