Well, the second game was 2 years after the first. My issue has always been a weak combat system, along with frustrations in movement. I was actually playing the second game, since it was a Games With Gold offering, just to finish up the last of my Achievements (like collecting the feathers and finding The Truth clips, got all but No-Hitter done). While I had quite a bit of fun fighting and stuff, the combat system is still really boring after a while, and when I was trying to do one of the races, my guy would decide to change course stupidly almost every time (but the last one, when I actually finished the thing). I'm hoping to eventually play Brotherhood and Revelations (both are in my house right now), but when my franchise-loving teacher says she thinks that Black Flag a great PIRATE game but a terrible Assassin's Creed game (a sentiment most reviews share), I question the point. III is supposedly bad as well, and I'd rather not sink 100 hours into the two games just to get to two massive disappointments.
Ryse is an interesting case for me. It does strike me as a mash-up of Assassin's Creed and God of War, because it has the latter's gore and over-the-top fighting, but it appears to have the former's redundancy and bland combat system. Sure, animations are great and dynamic, but when they say that executions are down to two buttons, I ask "why?" They shoudl have used that new D-Pad and made them fighting game-style executions, where you have to pull off bigger combos for bigger finishing moves, something to make the killing of enemies an engaging experience.