This is all prefaced on Dodd's quotes being accurate. That said, it still doesn't make sense. I get what you are saying about the long term, but here's the thing. If ESPN and Fox aren't going to boost up the contract much now with the bigger footprint (again, taking Dodd's quotes as accurate), then it doesn't make sense that they would boost up the contract later, for the same footprint.
I also don't think a reduced share is going to make that big of an impact. West Virginia and TCU started out getting something like 85% (not sure of the exact figure) when they joined. That's not going to give that much of a boost to the other schools. Plus, that partial share will increase every year, and then become a permanent full share. You seem to indicate that the new teams will start out with a really low payout (like $3-4 million or something), but there isn't any indication that they will start out that low. The only evidence we have is what TCU and West Virginia got, which wasn't too far off the full payout to begin with. Also remember, TCU was a mid-major when they joined the Big 12, and they didn't get the super-low payouts. I don't think the evidence is there to suggest the new schools will get a different deal than TCU and West Virginia.
To some extent, but it's not that big of a benefit. Texas will always make its bread and butter recruiting in state. Maybe grab a few players from Ohio, but again not that big of a benefit. Attendance at away games doesn't help Texas. Not a factor. Expansion isn't really going to impact the TV audience for the LHN. The LNH doesn't work like a conference network. LHN doesn't get an increased subscription fee or more distribution in conference states, like a conference network would. You might argue that more people in Ohio who already have the LHN would start watching it, but that's again a minimal increase.