I never understand when people say that the prequels had great world-building. Sure there was some, but it wasn’t great.
World-building can only be as interesting as the characters inhabiting that world, and all of the characters in the Prequel trilogy are so wooden. We see Mos Eisley for only a few minutes in Star Wars but it’s far more interesting and exciting than the Coruscant senate chamber.
I think the PT does a good job of world-building, but only on Coruscant. Outside of the boring Senate debates, we see a lot of different, and very interesting in my opinion, locations and settings and none of our characters draw attention to it. The opera scene is a fantastic example from ROTS. It’s tense and eerie, although that’s mainly due to the score and Ian’s performance, and is in a really strange and interesting location. We see a big sprawling night-life, but also a lot of normal hustle and bustle of the big city. Aside from the horrible 50s diner, I think most of the Coruscant scenery is good. The real problem that makes all of that world-building (if you want to call it that) essentially moot is that we never see Coruscant affected by the war or the rise of the Empire. Other than the Temple in flames, which is a great-looking shot, we get nothing.