This review may contain spoilers.
Matt Singer’s review published on Letterboxd:
This movie reeks of rewrites and reshoots. If Mel Gibson's hair constantly changing length from scene to scene wasn't enough of a dead giveaway, the fact that the movie abruptly ends the second the final action scene is over without any resolution of any of the subplots or storylines surely would be. Speaking of which: is Leo okay? How's Murtaugh's family? Are Riggs and Murtaugh punished for their actions? Murtaugh straight-up murders the guy who supposedly has diplomatic immunity. How's that fly? According to Wikipedia (which is never wrong), they actually shot a whole different ending with Murtaugh's family and Riggs' South African girlfriend, who ultimately dies in the final cut of the film. They reshot her death, it seems, but not a new ending.
Gibson and Glover still have great chemistry, and some of the action's good, but that's about it. The first movie has a story, not just a mystery but actual arcs for both characters. This one's just riffing, and a lot of it involves Joe Pesci as the most annoying character in movie history. I am surprised that this movie is as well-liked as it is.