If you are having a hard time thinking of TS credits what about upgrading to a Signature Dining experience for one of the meals? Our family loved dinner at Tiffin's in Animal Kingdom or California Grill can be a great nice night out on a rest/non-park day!
We did Liberty Tree Tavern during...
For QS, Harambe Market in AK has great choices as does Woody's Lunch Box or ABC Commissary in DHS. They all have something fun for adults and different (but still very kid-friendly) for kids.
For TS, Coral Reef at Epcot is great if they like fish, clam chowder, lobster bisque or shrimp. Liberty...
When I stayed at the Hilton Disney Springs a few years ago the buses were on a set schedule, so as long as you knew when they were expected it wasn't too bad. The buses were a bit far off the beaten path for pickup and drop off and didn't typically have a lot of shade.
Some really interesting ideas thrown around! Kouzzina (Greek) was one of my favorite restaurants before they closed it and would love to see a Greek restaurant come back.
I'd just really love to see them do something more with the American Pavilion. We have so much amazing regional cuisine...
My sweet-tooth loving solution:
Get dessert to go from Raglan Road, have for breakfast the next morning.
Go to Ghiradelli for an amazing sundae (or other dessert locale of choice) while in Disney Springs.
The only one I probably wouldn't venture to is Sprinkles, as we have one where I live, but...
So many great restaurants have already been said! Here's a few of mine, in no particular order.
Flying Fish (Boardwalk) - a Manhattan and the steak was actually amazing
Trattoria al Forno (Boardwalk) - Breakfast - who cares what you eat, the characters are the best! (the food was good too...
You didn't specify if you were looking for Table Service or Quick Service, but if you think you'd all want something different, there are a lot of great Quick Serve and Food Truck options at Disney Springs, you can all probably find something you'd like.
My personal faves are both Table Service...
Tutto Italia & Tutto Gusto wine cellar - we just love Italian food and it's great here! The wine list is on point too!
Spice Road Table - love this newer addition to Epcot. Gorgeous inside, have always had great food and great service.
My favorite is a Crystal Palace breakfast with characters before the park opens... but I wouldn't call it the "best"
I think for me the best would have to be Cinderella's Royal Table. It's just too magical eating INSIDE the castle! (Skipper Canteen would be a close second!)
Sounds like you've got some great choices! Have you looked at Crystal Palace for the second breakfast at MK? It's a breakfast buffet with the Winnie the Pooh characters and we've always had a great meal and a great time there!