If that's the case (there seem to be plenty of rumors from both sides on the Pac12/DTV thing, who knows how accurate they are) Directv might want more concessions if Pac 12 was holding out over with a demand for those seven full time channels.
Look at it from Directv's perspective - they've already lost the large majority of the hardcore Pac 12 fans who will cancel over the issue, because they've already canceled. They aren't likely to come back right away just because Directv added Pac 12. Directv probably has some pretty good internal estimates of how much not having Pac 12 Network has cost them, and might want a bit of concession on rates at this point to compensate them for that.
The only thing a network has going for it in negotiations is the threat of a provider losing subscribers. That's already happened to Directv, so what does the Pac 12 Network have to negotiate with now? The way I see it, Directv is in the catbird seat.
This doesn't apply for the SEC Network, or for BTN when it comes time to renegotiate that deal. They would lose subscribers if they don't have the SEC Network, or if they lost BTN. Both those networks have that ace in the hole, but that ace has already been played by the Pac 12 and they can't play it twice. That's why I keep saying people shouldn't read into the Pac 12 situation trying to figure out what Directv might do about SEC Network.
The 7 channel thing is a bit of a red herring when discussing the P12N. Very few of the existing P12N providers have all 7 channels. Brighthouse is one of the few, but it provides 1 channel on digital basic (in footprint), and the other 6 on its sports package. Dish came on board September of 2012, and they only carry a single channel plus overflows (available 120+ in footprint, sports package outside footprint). ATT UVerse took 3 channels, available on U300 in footprint, U450 outside, or sports package. The way the 7 channels have worked out in reality is more of an option package, under the basic framework of at least one channel on a basic tier in footprint, sports package (or very high level tier) outside footprint.
The biggest advantage the Big Ten and SEC has over the P12N are the fanbases. I used to live in the southeast, have a lot of relatives in the midwest, and now live in SoCal. I will argue til the cows come home that the PAC-12 has a great product, nearly the equal of the SEC on the gridiron. But the fans (on the whole) are not even close as passionate. Most fans of a PAC-12 team I know are bigger fans of an NFL team, and are okay with missing a few college games in order to keep Sunday Ticket. I don't think that will hold true with SEC fans, and DirecTV has greater risk of losing customers than what they faced with the P12N.
The SEC network also has the advantage of ESPN owning all games after CBS's single selection. The South Carolina/Texas A&M game would normally be on a primary ESPN channel, but ESPN can move some good games to the SEC network to make it "hurt" more if you don't get the game. I am curious if there will be a bait and switch once they get providers on board. Will they move those type of games back to ESPN/ESPN2, or will there be some guarantees to the providers on how many "good" games ESPN will put on the SEC network. Be interesting to watch it play out.