One thing I've learned since the Big Ten Network came about is that they don't even broadcast all of their Big Ten football or basketball games. In fact, since BTN's arrival more games are on ESPN and ABC than they ever were at least here. What's the point of having a dedicated channel and it's overflows to a certain conference when you give the games to other networks? Oh that's right. Money.
Point of my story is, I would personally expect more PAC12 games to be on channels you can receive (ABC, CBS, ESPN etc..) outside of P12N in the future even if DirecTV gets the channels or not.
BTN is part of the whole fabric of the Big Ten broadcasts. There are actually fewer games on other venues than there were before BTN. And a large amount of the games on BTN were not on at all prior to BTN or were regional only (and on things like ESPN GamePlan).
However, BTN does show games in every available slot, so they are utilizing the channel fully.
Why would they show all of them themselves? That would be dumb.
As for more PAC 12 games on ESPN, etc., down the road. Don't bet on it. The PAC 12 is geographically isolated from most of the country, particularly in terms of time zones. A Big Ten game can fit into the noon, 3:30 and 7pm ET slots for football. Giving lots of choices. PAC 12 would be 3:30, 7pm and 10pm. Making it less advantageous to the heavily populated midwest and east. Just by time zone alone, the PAC 12 is at a disadvantage.