I would not ever recommend cancelling any ADR based up on reviews here on the dis! All restaurants get their fair share of abuse around here. I am sure they will let you order something off the kids menu. When we dined there last, we had my 10 year old daughter with us, she was an "adult" so I was worried about what she might like there. However she went ahead and ordered the sp. and meatballs and liked it very much. The server did say she could order a kids meal if we wanted but told us the spaghetti was pretty basic and not spicy so thats what we did. At several other places however, we ordered her a kids meal with an adult ts credit no problem. They would generally give her a double portion which was nice. All the places we ate at for our 9 night trip also let us sub sides that were more kid friendly and often gave her a take away dessert (like a rice Krispy treat or cookie) since she was almost always too full to eat dessert. They were always happy to make an adult meal more the liking of our ten year old!
Disney is used to this and is happy to comply with your needs. In essence, its a good deal for them, to serve you a cheaper meal than what you paid for. Since they consider 10 and older an adult its their fault if they have to switch gears so often!
And for the record, we thought Tony's was very good. Loved the Lady and Tramp theming, the food and service were great and since its one of only two options in the MK that doens't have characters its a nice change. Its also pricey, so its a good deal on the DDP.