i have to say i liked the DLC - downloaded it this morning, and finished it after 3 hours. the enemies were not as fun to kill, but the slight bit of story was kind of cool.
liked when i got to meet some new and old NPCs, and the missions were somewhat easy, with a new hint of ending that is very interesting. i think this might be the end of Ezio's story, with the next game possibly featuring a new main character.
need to replay the painting code part because i'm @ 50% sync with that one. 2 new templar tombs to raid, but seemed very uneventful with lacking rewards