@Aerys: I understand that, but it's nothing you can say in general. But as said, i'd have loved to play Halo 5 campaign in a few months with my daughter, so i really see why that sucks.
But playing with friends is 99% of the time online for me nowadays (sidenote: which is why having no party chat on Wii U sucks).
Apart from that it is a great game, though the campaign isn't perfect.