In all the Halo film, games, and cutscenes I’ve seen before Halo 5, the grunts had eyelids and relatively humanlike facial expressions. In Halo 5, during the non-combat segments, I looked at the grunts standing around, and they all had crazy bug-eyes that made them all look like psychopaths.
Call me nit-picky, but I wouldn’t mean seeing the grunts faces improved upon in an update.