Add me to the LTT (lunch only) or Plaza-for-sandwiches crowd. However, I was pleasantly surprised by Crystal Palace---part of that is because of low expectations going in, and part is that lunch is surprisingly "affordable" there (at least, relatively speaking.)
But, if I had my druthers, and needed a meal in the MK area, The Wave is my sleeper hit for older teens/adults. For kids, and kids at heart, Whispering Canyon is always fun but the food is hit (maple-glazed trout) or miss (the skillet).