It is the same game, Ratchet and Clank and Ratchet and Clank. People shouldn't complain about the lack of innovation, but be happy that they get to continue with the story. That's why I buy sequels, for the continuation of the story. I mean why change a working formula that has brought so many happiness. I would rather stick with what works, than get something that completely ruins what the game is known for. I mean it does new things, like the new space exploration, right?
Take Halo for example, it has been repeating the same game play formula now, since it's inception, yet no one complains. Why? Because it works. And people don't want to change what works and is fun, which is basically what Ratchet and Clank is doing. So next time anyone is about to say it is more of the same, just think of Halo and everything will be OK.
PS: I used Halo as an example of an aging, yet working formula. I am not bashing any of these games in anyway. I am also not being Sarcastic.