I... I didn't like it, you guys.
It felt like an off-brand pretender to the throne or something. The tone was all over the place; there's one thing I'll get into in the spoilers that was so out of place for such a light-hearted, goofy series that more or less ruined it for me. The action was good and fun, but everything between the action scenes was... rubbish. There was one bit where The Rock forces some government agent guy to barrack for his daughter's soccer team that actually made me feel bad for The Rock having to say those lines; I thought I'd accidentally walked into a Michael Bay movie or something. They cast Imperator Furiosa herself in the franchise about driving cars, and she spends the whole movie standing near computers making her intense face. Later on she and the good guy hacker have a hack fight, which is accomplished by each of them typing at their computers and saying things like "Oh, she's good".
They have this schmuck of a character played by Scott Eastwood, who just kind of shows up on the good guy team for no reason. He's Kurt Russell's underling, yet he gets to go out and drive cars with the squad? No, man. You have to earn your spot. What's worse is that he's just a nothing character; I spotted his car at the end of the final action scene and I honestly couldn't even remember if he'd actually done anything the whole time. That putz might have inherited his Dad's face, but he didn't get any of the movie star material. I don't want to see him in Fast 9.
Lastly, I don't come to these movies for snappy writing, but when your characters are about to be pulverized by a Russian submarine and the best reaction line you can manage is "THAT'S NOT GOOD! OH THAT'S NOT GOOD!", you need to step back and take a look at yourselves. You can do better than this, Fast & Furious writers. Not much better, but better than this.
OK let's do spoilers:
Ocelot's Official Fast and/or Furious Series Tier List:
God tier: 5, 6, 7
Pretty great tier: Tokyo Drift
Eh, you could have done better tier: 4, 8
You don't need to watch these ones tier: 1, 2