TCU doesn't bring that market.
If you are talking about Tier 1, ESPN isn't going to be charging more to people in Dallas/Ft Worth if the PAC adds TCU. That isn't how it works. If you are going to claim that indeed this is how it works, you better bring some evidence more than your usual BS you are spewing.
If you are talking about Tier 3, the PAC-12 Network is struggling to even get on providers on the West Coast. They will only have marginal success with teams like TCU, who aren't even the most popular team in their own city.