We saw this yesterday, and it was fun, especially to see Jason. I gotta say as a moviegoer, I couldn't care less about the mythology of John Wick, its weird currency system and honor code. I feel like at this point that stuff is getting in the way of the only good thing about these movies, which is seeing Keanu kill everyone on screen with a bullet to the chest and one to the head.
I did appreciate that unlike Skyscraper, JW3's version of the Enter The Dragon mirror room added some new (and cool) elements to that much-imitated scene.