1) OP - already got some great recommendations. Also wanted to add Coral Reef. My dd got the salmon which she enjoyed until she tried my mahi mahi, then we ended up sharing. Even the grilled chicken was seasoned really nicely.
2) Ticket prices between children to adults is not much but the actual difference depends on how many days you have. If you log on to the Disney web site, you can see ticket prices side by side. If you have free dining, the adult upgrade is definitely worth it (unless you're doing mostly/all buffets, then it actually costs you more bc tip at each restaurant is based on actual cost), snacks are the same for all.
2) Ticket prices between children to adults is not much but the actual difference depends on how many days you have. If you log on to the Disney web site, you can see ticket prices side by side. If you have free dining, the adult upgrade is definitely worth it (unless you're doing mostly/all buffets, then it actually costs you more bc tip at each restaurant is based on actual cost), snacks are the same for all.