I'm fine with this. Yearly releases of good franchises can lead to healthy revenue stream that allow developers to create new games. The success of Assassin's Creed has allowed them to make a new installment in the Far Cry series, plus make a quirky spin off in Blood Dragon. It has also allowed them to develop Watch Dogs. Plus, whilst AC3 was poor on many points, it was clear that it had had a few years of development to be a new and different AC game, not 12 months like Brotherhood/Revelations did. Ubisoft is able to do both, and I like that. I enjoy the AC games and if more AC games means more new titles I don't see a down side.
“It's a movie. If you are going to believe and be affected by an action film, you shouldn't go to see Pocahontas because you are going to think you are a Disney princess” Chloe Grace Moretz, what a legend.