John,
Sounds like you have the planning well in hand! I would say that two princess meals are never too many! With little princesses-in-training you should get as much of this in as possible. While I don't know if I would add a third one on, I would always recommend
Akershus for someone looking for the very best Princess experience at Walt Disney World. With the broader range of Disney princesses in attendance, and the wonderful setting, it can be really great!
If you are looking for other meals, I am glad to make recommendations based on your interest. Just ask me from my bio page with info on cuisines you like, and I am glad to offer further ideas. Without knowing more, here are a few ideas;
Fun dining: Whispering Canyon Cafe,
50's Prime Time Cafe, Biergarten
More Character Fun: Donald's Safari Breakfast, Mickey's Backyard BBQ, Hollywood & Vine
What a Show: Aloha Dinner Show, Hoop-Dee-Doo Review
Dining for Parents:
California Grill, Jiko, Flying Fish
The best of the counter services: Flame Tree BBQ, Captain Cook's (Tonga Toast!)
I can't fit links to all these, but you can learn about them at the website!
Have a magical (and delicious) vacation!