Just finished it. Man, what a disappointing ending. Overall, I wasn't particularly thrilled with the game. I liked the story and setting, but things just never really seemed to get going. My big hope is that they were just setting up for another "Connor Trilogy", and I would have been much more satisfied with that. But the ending pretty much wraps up the series as it is. Sure, you could do another trilogy, but it would be completely different.
Stuff between Connor and Haythem was handled terribly at the end.
Just when it started to seem like Connor and Haythem might start to see eye-to-eye, and Haythem got really upset about Lee's burning the village, it devolves into "Oh, well, in the end, I just need to kill you anyway". I was really pissed off that things went in that direction. Haythem's philosophy made a lot of sense too. Suddenly I start to wonder whether the templars actually have the right idea. Just made Connor look like a naive idiot.
I love the Assassins Creed series, but sometimes they seem to purposefully obscure obvious plot points just for speculation. The Lucy killing left everyone going WTF, and they basically wait two games to say, "Oh yeah, I killed her because she was a templar... didn't you know that?" Am I the only one who has no idea where that came from?
ACIII really Harold's the end of the series in so many ways. I used to grab up all the games without question, but now, I'm sorta hoping they lay it to rest, because it could go downhill fast.