PG-13, poor casting decisions, and a story that writes out the whole reason anyone goes to see these movies for at least a third of the two hour runtime ruined it. I'm sure they will try to 'fix' the PG-13 with a bunch of CGI blood that looks fucking retarded when the blu-ray comes around, but it still won't make the movie any better. There was already way too much obvious CGI in the theatrical cut.
It's too bad, because with a hard R, practical special effects, and someone to remind Stallone of the reason why people watch this series it could have been the best of the bunch. Also, Ronda Rousey needs to get acting lessons stat if she intends to keep making movies, because her non-action scenes were just painful to watch. She makes Gina Carano look like Meryl Streep by comparison.