It would maybe be a 3.5 if the bosses were less awful. There's also a lot of parts that are clearly just there to extend the length for no real reason (the polterkitty running off with things you need, or the part where you have to go rescue a toad because he decided to go find something on his own) they also decided to add parts where you need really precise controls, like shooting a bomb into a boos mouth, while knowing full well the majority of players are going to be using the tiny control sticks that are just really awkward to do things like that with. I gave it a 3 since I did still enjoy a decent amount of it, it's just about 2 hours too long and the bosses were often awful.