A game has to stand on its own yo. Sam's daughter being alive isn't a "plot twist", its the first thing you learn and is therefore is just the "plot." Interestingly if no one had ever come to kill Sam he would have never gotten involved and the bad guys would have won, that's just sloppy writing.
2/5 is an insult. you know what else is an insult? being charged $60 for 2.5 hours of subpar entertainment.
The review was originally written a week or two after the game was released. Study Cove's servers were recently corrupted and are now making up for lost data.