I think the Skyline Pavilion would be a lot better if they cleaned/painted it and replaced the lights/fans/tables with newer versions. It always seems a bit disjointed/dirty, so that would almost definitely help. A few TVs would also make it more like the covered Jukebox Diner patio. Maybe the park can put in a small food stand across the path from it, blocking the view of QCSC but giving it some more purpose.
The Saltwater Circus lawn would be an awesome spot to put a new flat ride. I'm choosing to believe that is why the spot next to the Grand Carousel was chosen, in addition to being effectively right next to Tower Gardens. Kings Island still has a lot to do when it comes to improving their summer festivals. I do hope the park puts one of their little stages under the tent and has some small live entertainment there.