Yes, the preferred rooms are "rustic," but they are fine if you aren't hung up on the theme thing. I love the proximity of the preferred rooms to the main building/foodcourt/bus stops. POR is a bigger resort and walking a trek to get my refillable mug topped off is not on my list of "things to do." Ultimately it depends upon what is most important to you.
Regardless on what room you stay in, POR is a great resort that I have stayed both in the Alligator Bayou section and the royal rooms. I wouldn't, personally, stay in a RR again. Like I said in a PP, after the first 5 min and the first push of the fireworks button, the ambiance went away for me and it was "just another room." Not worth the $$.
Ask for the Oak Park section of the RR section with emphasis that it be on the river side. We paid for a "water view" to hopefully make it so that we weren't on the back of the building. This made us closer to the food court, etc. The grounds are beautiful and we had a fountain outside our window, which I found more interesting than the RR itself. The kids we took also liked the room, but it wasn't the highlight of their trip. They also lost interest after the initial wow factor. DD(12), Niece 10, nephew 9, friend 16.
Have a wonderful vacation whichever you choose!