I own and play them all and I feel they did add a lot to Revelations compaired to Brotherhood. The hookblade, cutscenes enhanced vision, and some of the missions they added. Highlights include one of the underground missions that went to cutscenes when things began to fall apart, the mission that has you riding the flying device being pulled in the air with bad guys on horses under you.

If the main campain was not enough, the multiplayer has been improved and adds more to the game.

I am looking forward to a new main character and more memories to unlock.