I absolutely love the choices, and flavors of Kona, we've done both, and I just wasnt thrilled with OHana after the changes, the CM's also didnt seem that "enthused", it maybe was an "off" night for them...
and your right there are a lot of families, and kids getting up and doing the races...
I'm a huge meat eater, and I did enjoy the teryiaki beef (from Kona) over the sausage and tough "steak" at OHana - but that was my preference... DD8 didnt seem too excited, maybe she out grew it, maybe it would've been more fun for her if she had a friend or sister???
I have a friend that swears by the Brown Derby at Disney/MGM Studios - grapefruit cake, and that huge salad thingy (lol Cobb)
but from your list, I dont know what I'd skip instead!!