This finally came out on PC and I've played about 7 hours.
So far all I have to say is...
Wut?
While many of the mechanics of this game are nice, I am absolutely flabbergasted at some of the design reversals they've done. It feels far more like a sequel to Assassin's Creed 2 than Revelations.
First, why is the "introduction" to the game more than 5 hours long? Good grief! I already know how to assassinate people, let me get on with it.
Second, there are SO MANY gameplay interruptions. Run around a corner: cutscene. Fall off a bridge: cutscene. Die: be forced into the same cutscene over again.
Third, mission requirements are WAY too freaking rigid this time. There are too many instant fail missions just from being noticed and not even really discovered.
Fourth, "checkpoints" are far too distant from each other. I can't tell you how many times I had to play the same 20 minutes of a mission because I fell off a boat at the end of it. It's ridiculous.
And this is just the first 7 hours! I've already heard that, plotwise, the game is pretty awful since many of the complaints pre-release were realized in the game (such as Conner and his attire not fitting in to virtually any scenario he is placed in and being force fed plot lines from nearly every major event of the American revolution). That won't keep me from continuing my playthrough, but geez...