Hmm, this is a tough one. Gotta think about that. Fallout's third act is so bonkers that I'm still not even sure how the next MI sequels are going to top it. An MI film also offers a nice variety of action sequences as opposed to focusing only on aerial scenes.
On the other hand, Maverick packs a nice emotional wallop that I don't think the MI films are able to quite tap into. I'll need more time.