My wife made me watch it a few days ago.
My wife loudly criticized the choreography in the Rey/Kylo fight. She's a martial artist. I'm not. I won't try to reproduce her criticisms here, but apparently the fight choreography was a disaster unlike anything she's ever seen before.
The main problem I had with the movie was its... well, to be frank, its script. I haven't seen many movies written as sloppily as this one. I really liked the broad strokes, even a lot of the things the "fans" complained about. The force gettin' weird was good, the parentage stuff worked, Kylo's repaired backstory as a sympathetic non-ideological outraged social reject worked, the 'kill the past' / break with the OT stuff was a surprisingly enjoyable theme. It's a much better written movie than TFA for sure, if nothing else because the story was driven by the deliberate actions of its participants instead of by accident. I could say a lot of nice things about this movie. However, for every good moment, there were at least two of slop.
The most interesting character in the entire movie was Holdo, who they killed. I bet they regretted that choice a lot after Carrie Fisher died. They should have regretted that choice for other reasons but I'm sure they don't. With shockingly minor changes to the script, the movie would have been a great leadership hand-off story from Leia to Holdo. The mutiny was a perfect opportunity to vindicate Holdo's leadership despite the concerns of established characters. Instead, they killed off Holdo (undermining the 'let the past die' thing) and let Leia survive (even though she doesn't do much of anything for the rest of the movie, not even helping Rey with the boulders despite also having superpowers).
Poe is a dick, and making him the ringleader of an attempted mutiny that turned out to be an asinine mistake was good. At least it would have been if he wasn't always right. Remember how he disobeyed orders to sustain his attack on a ship with a doom cannon that could pick off capital ships in one shot? It was, at the moment he was fighting it, picking off capital ships in one shot. The resistance fleet had minimal fuel and could be tracked through hyperspace, so even if they had gotten away, that dreadnaught would have still obliterated them. Disobeying orders was the only reason the fleet lasted as long as it did. Maybe they were going after the "smart jerk" archetype - saying that being right doesn't make up for being an *******? But if so, that point was also undermined by the fact that Holdo apparently didn't tell anybody about the real plan, leaving her officers no recourse but to remove her from command.
"only the lead ship can track us through hyperspace" - Why? How would Rose know that, given this technology is apparently unheard-of?
Rose's job is to guard the escape pods to stop deserters, but after stunning Finn she appears to have abandoned her post?
If Rose was willing to sacrifice herself to save Finn, and flying fast enough to catch up with him, why didn't she just fly into the laser cannon herself instead of crashing into him?
I get that the cracker knew there'd be cloaked ships, but how did he know how to let the First Order detect them?