I'll just chime in here with my nickel's worth...
We really enjoyed Artist Palette on our trip 12/18 - 12/25. I second the flatbread pizza...posted a photo of it on the food thread on the restaurant board. In addition to the items listed, we noticed they always had about 4 "board specials" each time we were there...different choices each day. The first day they had a few different panini sandwiches. We tried the BBQ pulled pork panini with smoked gouda and apple chutney, served with a side of Saratoga chips that was fabulous. These specials are limited in number...when we ordered 2, the CM double checked how many were left...2, so she erase that special as soon as we ordered.
As for the internal bus...only saw it a couple of times, but like DuckyforDisney, we were in the Paddocks, right behind the Carrousel bus stop and felt the walk to the Carriage House was easy enough. We didn't opt to do the walk to DD on the north end (Marketplace) since we had a bus stop right there.