WW84 Spoilers:
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Short answer: it's good, but not quite great.
I agree that in many ways, Wonder Woman 84 is a hot mess. Powers were invented out of thin air and then forgotten about. Wonder Woman can suddenly fly now, it turns out flying isn't actually all that hard. And there is a lot of 80's groupthink that history proved wrong, like the Reaganesque president precipitating World War 3, instead of defeating the Soviets by standing up to them and making them eat the consequences of their own bad choices until they collapsed from their own rottenness. Plus a ton of other virtue-signalling and self-indulgence along the way.
It's over-wrought and in many ways a mindless spectacle, but it works.
I think the movie's strengths manage to outshine its weaknesses. And its strengths are definitely the characters it creates, which are solid and original and pretty much hold together and make the story work. Maxwell Lord isn't a political cartoon come to life, he's his own thing, well-acted, and you get where he is coming from while still understanding why he's wrong. Kristen Wiig really shines as Barbara Minerva, and is believable in both her frumpy stage and her supervillain stages. The conflict between Cheetah and Wonder Woman is well done. Chris Pine is absolute gold as Steve Trevor, and he tends to steal the scenes he is in, in a good way. And Gal Gadot is simply glorious as Wonder Woman. Kind, vulnerable, mortal, but strong and wise and clear-headed, and absolutely gorgeous but always on target.
Is it the best possible Wonder Woman movie? No, as I said it has a lot of weaknesses in the script, it just manages to get past them and succeed on its own strengths. I think the first one is probably a better movie, it certainly had a better script. But this one is definitely worth watching.
If I were to compare it to Ghostbusters 2016, WW84 is a much better movie because its central story works. WW84 is a superhero story that's super. GB16 was a comedy that wasn't funny.
If I were to compare it to a Marvel movie, I think I'd compare it to Avengers: Age of Ultron. Both movies have kind of rickety underpinnings, but manage to get past them to the good stuff. Both of them are kind of long, and have stretches that are somewhat dull before picking up again. I think WW84 is better than Age of Ultron, though. WW84's dull spots are shorter than Age of Ultron's, and its best bits are better than Age of Ultron's. WW84 sticks to its central storylines better than Age of Ultron, which had way too many characters and subplots, not all of which were compelling. WW84 has only a handful of storylines, and most of them land.
In the end I would say it was well worth watching, for sheer spectacle and craftsmanship, but you could certainly make up a Top 10 list of superhero movies that doesn't have WW84 on it.