Cinematic trailers aside, I have spent the last hour watching new Revelations cutscenes, and comparing them with Brotherhood cutscenes (as well as moving the camera to check out Altair in the first AC), and I definitely agree--our boys have changed. It's not age, by the way. I might be able to accept Ezio's changes if they didn't also change Altair and Desmond. Just watch all the videos. The nose is more flat, the lips are bigger, eyes are smaller and closer together, and the jaw is less sharp. Let's face it, they aren't using the same base for our boys anymore. I'm not sure what happened, but honestly, I'm incredibly angry about it. I'm having a hard time even watching clips because he looks NOTHING like he did before. If I could get my hands on any other character clips, I bet you the rest don't look the same. Al Mualim I can't really tell because I never paid too much attention to his appearance in AC1.
The cinematic trailers did all right, actually. I sat back and compared those as well, and from what you can see of his face in the previous games, it's still pretty consistent. He looks about right, just aged.
Actual gameplay however.... pissing me off.