You do realize that Naruto and Hinata are on a team of people, right, and that it's not just them? If it was, you might have a bone to pick.
I do realize that in all the previous movies of Naruto Shippuuden there were always several characters announced as part of the main cast, but they got just a couple of minor interactions (plain and boring) and short battle moments (nice animation, but hardly anything new). They really looked like background in full sense. Characters playing the role of background by the rules of fanservice. Even PURE OOCness NEVER stopped SP.
I've never seen a believable Sakura in these movies. Not once. I am not even daring to say anything about developing her character further, showing some new sides of her. Even RtN decided to degrade her to her Part 1 self. Well, she might have seen a new side of Naruto when she saw him with his parents, so maybe this is a little exсeption.
There was Naruto, his main rescue interest and the main bad guy. Just them.

(The fault, dear Brutus, is not in our stars, but in ourselves, that we are underlings.)