Thanks for all of your responses. I've enjoyed reading everyone's different reasons for upgrading (or not) to deluxe dining.
We decided that upgrading would be best because we were paying OOP for three TS meals, would have to pay daily for at least one extra CS, and we figured that with two small children (one an infant) it would be good to get out of the heat for a while. We've had too many bad CS experiences on previous trips, not being able to find seats, standing in line forever. We've scheduled breakfasts so that we'll be done by the time the parks open, and we usually stay at the parks from open until close, so we won't really lose any park time. For my dd, the character dining is an attraction in itself!
So here's what we've booked:
Day 1
WCC Dinner
Day 2
Crystal Palace BF
The Plaza L
Hoop De Doo D
Day 3
Akershus BF
Garden Grill L
Le Cellier D
Day 4
Hollywood and Vine BF
50's Prime Time L
Mama Melrose D
Day 5
Ohana BF
Coral Reef L
1900 Park Fare D
Day 6
CRT BF
Liberty Tree D
Day 7
Kona BF
Yak and Yeti late L
Day 8
Boma BF
Chef Mickey's D
Day 9
1900 Park Fare BF