There wouldn't be ANY dish that could do 82-91-129, as the most you can get is 40degree seperation. So it would become a 2 Dish solution. Thing is, with adding 72.5 for many people it would also be a 2 dish solution since in Ontario, 82w is the Peak elevated satellite, so hitting 72-82-91 is not technically possible without a crazy satellite that takes that into consideration the different elevations as opposed to skew.
I agree with the Ciel thing, Dish is leasing 16TPs at 72.5 and already has 16TPs at 129w. Ciel2 is going to have 16 BSS TPs (read:Expressvu type, not Starchoice type) that won't be used and unless another company decides to startup in Canada, which I cant forsee happening, Expressvu is the only people who can use it for End-User purposes.
What do I forsee being the difference between 72.5/129? Well, I disagree in that I don't think it will be locals, or at least 'major city' locals. Instead, I think we could see networks such as the Movie Network with their east feed on one and the west feed on the other, and eventually the small DMAs such as 72.5 having MCTV-HD and 129 having CBC-N HD. But the main ones, Toronto, Vancouver, Ottawa, Edmonton, Calgary, Montreal, Winnipeg and I am sure a case can be made for a few other DMAs won't be leaving the main 82-91mux.
The other possibility is they could simply just mirror stations between the two orbital locations. I think it is a waste, but then again Dish Network is doing it right now with 61/129 for all of their CONUS broadcasting, and Expressvu could easily do the same.
Just my 2 cents...