I have 3 picky eaters and they all LOVE 'Ohana. We've done it for a few years now, and never had a bad experience. It seems that my kids have never left hungry!
My favorites are the steak, and the noodles. I also LOVE the bread pudding with foster's sauce. It is incredible! My kids, who don't like bread pudding even eat it. But if by chance your dh doesn't like it, she can just have vanilla bean ice cream with Mickey sprinkles that always comes along with the dessert. YUM!!
My kids always seem to gravitate toward a type of meat, usually the steak. They have 4 different kids of dipping sauces to try with each meat, along with ketchup (and I'd assume steak sauce) if you ask. The noodles are a hit with the boys too, as they are just basic. The broccoli never goes over big at our table though!

The wings are alright, but somewhat sweet for my taste. They also have dumplings that are quite good.
I do believe though, that if you ask, you would be able to request a kids meal (like chicken nuggets or mac & cheese) but remember, it may take a LONG time as ours did one year at Biergarten!
And I forgot to mention the salad and bread to start with. Not a big hit with my kids either, but my dh and I enjoy them.
Good luck with your choice! 'Ohana is definitely our favorite place to dine at WDW. Ask for a table with a view of the castle....REALLY neat experience.