also, between this and the mark VI. there is no reason to think that the VI won't be better, as it's had more development time, as well as time for them to learn from this redesign.
Opinion:
Hips will be the same, they introduced the hip articulation on the IV, which is why it gets mentioned there, but it's a repeat, standard feature on the VI, thus it doesn't get mentioned other than "articulated figure"