3 words...
B & M
I don't care which one, any of them, ok, maybe not a stand up, but any of the others...floorless, inverted, hyper, drop coaster, flying, or even something like the Hulk. Dueling coasters wouldn't be bad either.
If B&M is out of the question, I wouldn't mind a nice intimin either. 300, 400, 500 ft tall intimin, any of those would work for me.
Aside from coasters, I'd clean up the park, enforce the wardrobe a little better, spruce up the landscaping, throw in an awesome darkride (like darkastle or spiderman). I'd add some funding to the entertainment budget, bringing back favorites like the Star Trek characters or the "Way too much TV band", and the live bands that used to play at Bubba Gumps and out in BB. I'd also throw in a night time parade and show to complement the nighttime fireworks. I'd also bring back an animal show or a stunt show, and get rid of one of the karoke shows. I might try to partner up with a few untapped cable stations, like the Discovery channel or the food network, hosting live cooking shows in the park like Universal does with Emeril from time to time, or have the Tuttles come in and show off a few of their bikes. I'd also try to add a few local marching bands to the parades, like Kings or Mason, or even UC.
From a food and beverage standpoint, I'd try to add to the parks already nice assortment of menu items. I'd probably update Wings diner and add another stand serving good wholesome foods like fried chicken and mashed potatoes. And of course we need deep fried turkey legs, even though they didn't do well in the past. We'll leave all of this up to Italian Chef. The only other changes I'd make would be more funnel cake locations, probably right on International street, and I'd take a serious look at the financial offering free soft drinks like the friendliest park in the world. Also, free parking wouldn't be a bad idea.
Ok, maybe I took this idea and ran a little far with it, but if I were Exec VP at ki, I'd take a look at a few of these ideas.