I wouldn’t say so. Each entry in the series provides a new, massive and accurate representation of a city or area as it was in the time period. The story can seem disjointed but is still there as it has been set up since the beginning of the series. Gameplay can feel repetitive, but each iteration adds more for variety and refines the old to make it different and more suited to the game’s character. If anything, Ubisoft is trying harder each year to appeal to an audience that is increasingly critical not because it’s bad, but because it’s familiar.
Then you figure in how many other major titles Ubisoft puts out regularly, and the quality that they still put into Assassin’s Creed, and it becomes rather impressive, even for a major company. They may not deliver on people’s hopes 100%, but then neither does any company ever in the history of humanity.