Kona Cafe we loved for breakfast & dinner - I would definitely keep it.
Liberty Tree for dinner was just o.k. -- the characters were the better part of the meal. Since they cancelled the characters I doubt that we would ever go back for dinner (there's no pot roast meal at dinner, by the way. It's the "Thanksgiving" feast, served family style.) The best part of the dinner food was the dessert. Lunch may be better there since I believe you have some choices on what food to get.
For a dinner meal in the vicinity of the MK, I'd take the monorail over to the Wave at the Contemporary or the Grand Floridian Cafe for great menu choices in a nice atmosphere.