Damon,
Year after year, Laurel's customers vote with their wallet, and Goose Creek remains her top seller. I can see you are in this group after tasting one!
If you look at picture #4 above, my Goose Creek on the deck is also turning yellow and wilting. I attribute some of this due to being on the deck with less than 50% Sun exposure under the lattice panels, along with being a$$-to-teakettle jammed in next to the adjacent EarthTainer.
Next Season, I am really going to space the 'Tainers out with more room for airflow, and Sun exposure. I am also going to try to make my own Combo Mix from high quality Sphagnum Peat Moss, aged Bark Fines, and Perlite in the 3:2:1 Combo Mix.
My past experience has been that Goose Creek is prone to yellowing much more than Big Beef, and other varieties. Like Wolfgang Amadeus Mozart, I will tolerate indiscretions, as it is my favorite tomato.
So far, 6 of my 8 Goose Creek plants are doing well, so I'll save you some of them over the Summer.
Raybo