Have a great trip! Here's a few thoughts.
We did the deluxe
DDP and with appetizers included, we needed a good amount of time between meals. We usually had 2 meals a day either early lunch (11/11:30) and early dinner (4/4:30) or lunch (12/1) and later dinner (7/7:30). That seemed to work. There were a few days when we had a character breakfast at 8am/9am, lunch at around 1:00, and a much later dinner at 7:30pm.
I'm reviewing many of your restaurant choices (link below), the one for Brown Derby is done. You picked some fun places to eat!
Hollywood and Vine was fun for breakfast. DS5 liked dancing with Oso and Handy Manny. Sci Fi is also fun to dine in the cars and watch the old movie clips -- food not as good as other places. We really liked 50s Prime Time this trip - great food, fun theme, milkshakes awesome.
Went to 1900 Park Fare for breakfast in 2009, dinner in 2010. Enjoyed it both times but I wished we did something different for dinner. It is an easy way to see Cinderella without a line but we saw the princesses in the parks too.
We like Marrakesh. You will read some bad reviews but many people like it very much. It's an interesting restaurant with fun music and belly dancing. Service and food was great. We enjoyed the experience of being there in Morocco but I don't think the food is so different that picky eaters could not be happy.
Chefs de France. Be on time for your ADR, I heard they are strict about that. Remy does make appearances some days but might not so I'd let that be a surprise.
We followed the times guides at this web site and were able to time our ADRs right for the belly dancing at Marrakesh and Remy at Chefs.
http://pages.prodigy.net/stevesoares/
Coral Reef was very enjoyable. If you can wait a little bit, I'd request a table next to the aquarium if you can. I think those tables seat 4 max so it might not be possible if you have a large group.
Have a great trip!