There are so many things that would be a good addition to Kings Island. Here are a few big ones:
Rides:
1. A new B&M wing coaster or dive coaster would fit well in the park, you could put this in The Vortex plot by The Beast (Think of walking down Coney Mall and seeing this new ride looming in the distance).
2. A ground-up RMC Son of Beast. So much woods to work with, and tons of space to work with.
3. A dark roller coaster similar to Revenge of the Mummy at Universal Studios Orlando
4. A Mack Rides Striker Coaster similar to Voltron at Europa Park. This model is epic and if it is anything similar to Voltron, this could be Kings Island's next best ride.
5. A Mack Rides indoor/outdoor water coaster similar to Journey to Atlantis at Seaworld Orlando
6. A Premier Rides multi-pass launch coaster with a spike and inversions
Food:
1. The food is pretty good already with a good variety, but if they upgraded their burgers to be extra smoked, that would be great.
2. Maybe add a good themed dining location (For example, a space-themed sit-down restaurant).
Special Events:
1. Have more rides open during Winterfest (Kudos to KI for opening more rides this year).
2. Add more family-type things to do during the Halloween Haunt
Park Revisions
1. Do something with the old Action Zone (Whether that be re-theme or what. You could do a whole scary section with both Banshee, Bat, and a possible RMC Son of Beast?)
2. Retire Invertigo and Congo River Falls (sorry to the Invertigo lovers) and replace it with something new.
3. Redo the front entrance. It kind of looks old and plain, and could be renovated
There are a couple of them! Thanks for the opportunity to respond and have a great day!!!