You do realize they'd have to add HBO/Fox RSNs BACK in order to make your "both systems carry all channels" dream come true, right? So you can't count that space that's been "freed up" due to disputes.
Dish has basically fewer than two Ku satellites per arc carrying national transponders. Even if you round up and assume they had two full satellites carrying national transponders that's only 64 Ku transponders. Directv has 32 Ku transponders (currently only 26 are national but the rest will be by the time any merger scheme could happen) 68 Ka transponders (and 36 RB transponders but we'll ignore those) The Ka transponders have 50% more bandwidth (36 MHz versus 24 Mhz) so Directv has 134 Ku equivalent transponders - more than double Dish's bandwidth, and that's after I generously rounded them up to 64 national transponders which is probably 30% too high. The real number could be 3x the bandwidth.
No, you misinterpreted what I wrote again. In my last post, I said that the DTV fleet, but not the DISH fleet, would carry all of both systems' channels. The DTV fleet already has the HBO, Cinemax and RSN channels.
And the DISH fleet would carry as much of the DTV system as could be squeezed onto it -- given the current channel package scheme, perhaps it would cover all the channels in DTV's Select, Entertainment, Choice and Xtra packages, plus all the DTV premiums (as well, of course, as everything in ALL of DISH's line-up), but it wouldn't be able to carry a few of the additional channels in DTV's Ultimate package, as well as a few random things like stuff in the HD Movie Pack.
We already know that DISH's fleet has the capacity to carry everything it has now plus those HBO, Cinemax and RSN channels that it used to have as recently as a year ago. So there's room to add all that back in. And I'll bet that there are VERY few channels that DTV offers in its Ultimate package that aren't already a part of DISH's America's Top 250 package. About all I see are Aspire, Audience, BBC World News, Centric, Chiller, Discovery Life, El Rey, Ovation, Universal Kids and Universo. And many of those are only in SD on DTV. See what I mean? It wouldn't take much extra room on DISH's fleet to squeeze those few channels in, in at least SD.