'Naked Gun 33⅓: The Final Insult' is the weakest of the trilogy, though fair amusement is still produced.
Leslie Nielsen is so good in the lead role that I don't think it's really possible for these films to drag, at least alongside the decent gags and short run time. Admittedly this third entry does meander a tad, though my interest in events never waned into negative territory. The ending is the strongest part, that facepalm scene (which I knew of before) is gold.
Overall, this is a good franchise. I'm quite looking forward to hopefully checking out Liam Neeson in the 2025 remake, as long as the writing is suitable I think he can absolutely make it work.