Child actors vs. the adult actors.
Did anyone else think the child counterparts did a better job than the adults? Jason Momoa came off more like a horny frat boy bully looking for a fight rather than an epic warrior destined to become a regal warrior king one day. Rose McGowan acted like she was in some kind of steam punk apocalyptic movie instead of a powerful and mysterious witch. She just came of as a bratty violent brat.
The child actors I think fit in to this movie well while the adult actors seemed to have been just crammed into it.