Am I the only one who wasn't impressed with the Eyrie? Sure, it looked impressive, but I think it was the first time watching this show that I said "oh, that's obviously CGI."
I was also disappointed with the Eyrie, but only because it was not at all how I pictured it from the book description. In the book, it was described as being high on a solid mountain, and not necessarily at the top of the mountain. From the Eyrie one can see the waterfall, Alyssa's tears, on giant's lance. From this I understood that the waterfall started at a greater height than the Eyrie, and pictured it as a part of a continuous ridgeline with Alyssa's tears pouring out higher up but reasonably close to the castle. The castle is also described as having 7 very slim white towers. The great hall was described as long and narrow (more rectangular, then), almost all white, with some blue veins in the marble, and basically very sterile, empty, and cold. Finally, it looks out over and has a clear view of the whole Vale of Arryn below.
From the first external shot of the Eyrie in the series, it looks like it has hills/mountains on all sides and not a great plain. The Eyrie itself looks more Eastern, like the Hagia Sophia in Istanbul, and not shining white. (Winterfell also seems to me to have a more Eastern architecture in the series, which surprised me.) The throne room is also round, not long, and dark, not bright, cold, and sterile.
I imagined the sky cells to be much smaller, which would make them much more threatening. In this episode, Tyrion is put in a huge cell. It does not seem like he would need to fear rolling over in his sleep and falling out if he was in the back corner.
Other than making the sky cells less scary, though, none of this really matters. I agree with others that Renly should show a bit more strength and confidence and I didn't really need the Loras/Renly scene, but I am enjoying the series and thought this a good episode overall.