Jungle Cruise should be torn out and replaced. Mediocre at best, essentially superfluous with the existence of Animal Kingdom, and Disney could do more interesting things with the huge plot of land it takes up. The one at Disneyland should stay since it was Walt's attraction, but the Disney World copy can go.
While Na'vi River Journey isn't better than Flight of Passage when riding both for the first time, the re-rideability for NRJ is higher. Once you've been on FoP a few times you're basically just watching a movie (a pretty movie, but still a movie). I actually enjoy NRJ more than FoP now; it's a more immersive/transportive experience.
Cosmic Rewind isn't anything special. It's a fun enough roller coaster, but it fails as a Guardians of the Galaxy attraction and as a themed attraction in general. The story is basically incomprehensible and pointless -- the ride would probably be improved if it was just a space attraction focused on nebulae, stars, etc.
DHS was a better park in 1995 than it is right now.