I agree with you about ABC Commissary. I ordered the burger there, which is my litmus test. It was the most mediocre thing I've had at Disney. The burgers at Pecos Bills would hit the top of the scale; this would hit bottom. I know some people like the chicken curry, but curries and I don't get along.
I'd get a sandwich at Starring Rolls as an option. I find the food I had at 50's Prime Time and Brown Derby to be good, much better than a counter service option.
I'd leave the park and go to Picabu at the Dolphin before doing counter service at DHS.