Thank you. This has always been my thought as well. Uni in Florida has an excellent roster of rides between their two parks, but outside of their roller coasters the headliners tend to be similar in structure and execution which is often expressed as being too screen heavy. I thin part of that is not just the use of screens but how they are used where you have the "something goes horribly wrong" storyline and you see something attacking your vehicle, you get moved around and sometimes with some physical effects (water, fire, wind). It can feel a little repetitive when riding all of them.
One of the huge selling points of the castle parks (and a big reason I think they are so popular) for Disney is that there is a huge variety of quality experiences within them. Thrill rides (yes, generally on the mild side of that scale), immersive slow moving rides with music and huge showpieces, small "cute" dark rides, slower paced theme-enhancing rides, AA shows, all coupled with great large scale entertainment (fireworks, parades) which creates a very balanced experience with something to appeal to everyone.
To bring this back to the topic at hand, the new additions for Pandora are perfect in this way. What is being added, at least from what we know? A "flying ride" using screen based simulation tech and having some degree thrill level. And a boat ride which is calmer, but using a new ride system allowing greater movement to enhance the effects. Both of these will be quite different from the other (admittedly few) rides in the park. We also will have a new nighttime entertainment unique to the park. All this is a great way of complimenting the existing offerings there. Too much of any type of experience in one setting is not ideal which this expansion seems to be avoiding.