Excellent points, but how do you avoid Houston for the above stated reasons?
Houston would be a "done deal" to use an old phrase from this board if it were outside of Texas. If the Texas' administration was more diplomatic in it's interactions on various concerns of the conference such as expansion, I don't think the non-Texas teams would be so against Houston, but none of them want to see Houston in the fold - regardless of the merits of Houston.
TT and TCU will line up behind Texas because that is life in the Longhorn shadow, but Texas only wants Houston because it is another pawn to use against the conference power balance. No one wants Houston for what Houston brings to the table.
Stripping away the emotion of the Houston petition they are not a bad choice, but they are also a bit of a flash in the pan. Their HC is likely to vacate the premises as soon as the next offer comes in and without him, Houston offers nothing that matters in terms of matchups. This is the same thing that is killing UCF and boosting BYU and Cincinnati.
If we had a network going forward, Houston would have a better chance. Right now the only way I see Houston getting in is if Texas grabs them as a voting pawn to hold on to that veto position. The only way they get Houston is if they give up something of equal value and Texas has said no to everything.
This was the same sort of strategy Miami used in the 3 years prior to their exit of the Big East and frankly, I would be happy if Texas took their over sized ego and self-delusion of grandeur and left the conference. There are small but possible chances we would see Nebraska and Colorado return and I would take both of them as a better deal to the loss of Texas.
The Big 12 could then get a network and it has the whole state of Texas to host a channel that does not have the Longhorns on it. Oh, the irony!