I enjoyed both films a lot; Tom Cruise owns the role as far as I'm concerned. With this film, I was never bored, I liked Colbie Smolders character; she was a beautiful, strong and smart woman and an equal match to Reacher, and she did her own stunts. I liked the new dynamic between Reacher, Turner and the young girl, the action was good; the fighting sequences looked gritty and painful and I really enjoyed the ending showing an emotional vulnerability of Reacher. I really appreciated Tom Cruise not being afraid to show his age in this film; instead of being a larger than life Action Hero like he has been in most of his other films, in Never Go Back, he's not a superhero; when he is hit, he is is pain, when he falls, he doesn't bounce back up, it's hard and he is in pain, but he gets back up, he is a MAN, that's what I got of the film and I really REALLY enjoyed it. I sincerely hope there will be a third Reacher Film with Cruise in it.
As for the 4k version, the picture is vivid and the sound rocks, the special features are great as well on the Blu-Ray.
I highly recommend this film!