Again I don't think anybody really minds that this game exists, it's just that it's alone in EA's lineup as a a non-sports, non-demographic-reconstituted-gamer-dynamics game. People don't really mind spinoffs so long as the real thing is also there for them. If this were, say a special mode in a Port of Dead Space, then people would definitely not be as harsh on it. And if it were announced that, say Dead Space 2 were announced as a Wii-exclusive, built from the ground up to use the Motion Plus and such, then nobody would have a problem with them trying to introduce the game with a spinoff or that being their lead game.
But since there seems to be no signs of any of that occurring, then It's safe to say that this game by itself is a pretty weaksauce effort, no matter how much production value goes into it. Even if the game is great, it's still at best a focus-tested spinoff or WORSE, a cash grab to justify and fund more games that Wii owners will not have access to.