It really depends on your kids, as a child I was never into the character meet and greets. I'm so old, they didn't have Character "meals" back then. I still don't do "Character Meals", and the only one that was ever a "must" for us was the original Chef Mickey's at Downtown Disney. Mainly because the character was more "atmosphere" than interaction, and the food was fantastic.
If your child really thinks you've scheduled too many charatcer meals, then maybe you should cut out some of them.