I suspect this is a case where Dish shot itself in the foot. In the middle of negotiations with BTN they gave in to Pac 12 for multiple channels. Why wouldn't BTN dig in their heels after that? I'm in BTN territory but don't watch it that much. My alma mater is in the Big East but moving to ACC next year. And I love SEC football which is free on CBS. Found more games than I had time to watch before BTN and I'll be fine without it if they never reach agreement. Would be really unhappy if I had to pay extra because Dish caved on a fee increase for BTN.
Dish didn't give in to PAC-12 for multiple channels. In face Dish didn't give PAC-12 as good of a deal as Big Ten in terns of number of channels...
Big Ten has: Full time SD main channel, Full time HD main channel, 4 part time alt SD channels, 4 HD part time alt channels.
PAC-12 has: Full time SD main channel, Part time HD main channel, 4 part time alt SD channels, 4 HD part time alt channels.
So... PAC-12 didn't get a full-time HD feed at all! Big Ten did... otherwise, no difference.