Not every game needs to be multiplayer, But i disagree that they should spend time pleasing a hand full of anti-multiplayer fanatics that whine whenever even the thought of playing with someone other than themselves arises. It seems clear that some people just don't play games where playing with others is optional and not required. Even those where the goal of the game is literally to automate your way forward , multiplayer can still exist contrary to what Greuslich believes.
That aside it would be a good game to pick up. I'm sure my wife and I would enjoy it and pick it up if it ever did have multiplayer. FusedHalves is right in that multiplayer can bring an interesting experience.