So I saw it in theaters the other day and I gotta say, I was satisfied. There were only a handful of people in the theater, but there was this one scene that came out of complete nowhere, and everyone in the theater lost their shit over it. It was a great experience. I'm really glad that the scene wasn't spoiled in the trailers.
My only qualm was that they couldn't have made it any more obvious that Dr. Nefarious was going to betray Chairman Drek. There's this scene where one of the Rangers shows Clank a mugshot of Dr. Nefarious and tells him that he's evil, as if the audience wouldn't get that from his name. And I think they didn't explain why Nefarious wanted to blow up the galaxy. They mentioned that he turned evil because he was bullied by Captain Qwark. They should have thrown in a line that he wanted to destroy Qwark's livelihood as revenge or something.
I found it kind of hammy how they name-dropped weapons like it was an ad for a toy line, but it was done as tastefully in my eyes.
I would have preferred Kevin Michael Richardson as Chairman Drek, but I can see why they chose to recast him. He gives off too much of a discount Darth Vader vibe, and he'd sound more menacing than Nefarious. Acceptable losses, I guess.
I would have liked the Blargian Snagglebeast fight to have made it in the movie, but it was already packed with boss fights, so I can't complain. They also dropped the ball by not adding a new prefix to Drek's title every scene.
They made a lot of retcons to the game but there were also a ton of references to the original trilogy and the Future games. I think this movie had a ton of meddling from execs who wanted it to be some generic family movie shlock, because when the humor falls, it falls hard. Characters make a ton of pointless snarky comebacks that all feel like they were shoehorned in to stop the movie from being 100% inside jokes. You can really tell what lines were written in by the writers and what the execs added in.
R&C got terrible scores on Rotten Tomatoes and I can only assume it's just getting slammed by people who didn't play the games. It's also being marketed like dogshit so I have zero hopes for a theatrical release of a sequel. Unless, God forbid, they decide to sell out.
I like to think that the retcons were all made because they didn't want to rehash the cutscenes and call it an original movie, but I still think they missed out. R&C 1 had a really good story and Insomniac would be remiss if they don't end the rebooted trilogy with Ratchet going "That's not how it happened!" then summarizing the plot in a more accurate portrayal.
TL;DR: As far as game-based movies go, this is the best one in the mainstream. As a letter to the fans, it's as good as it can be, I suppose. As a standalone family film, it's terrible. Any problem you might have can be chocked up to meddling executives. And if you can accept this as an alternate timeline or something, you'll be able to get over the retcons pretty easily.
Also I predicted they were going to retcon Drek to be blowing up planets for his mother's affection. He was doing it for his father!
Oh, and the Plumber makes an appearance. He has no lines but he's wearing a shit-eating grin during his bit of screen time.