Nobody seriously believes that any other team in the CFP conversation would have won three of five against Ohio State, Vandy, ousux, aggy, and Georgia. If BYU were to sneak in, they would be blown out and embarrassed. Same goes for Utah, Virginia, and whichever G5 gets in.
"Deserve" should not have anything to do with it. The task of the committee is to find the five best conference champions and the seven best at-large teams, using all of the information available to it.
The five best conference champs will come from the P4 conferences and from one G5 conference. I don't think anyone here would disagree that Texas for most of the season was not one of the seven best at-large teams, but they clearly improved and are currently better at least six of the other teams in the CFP conversation. I don't think any of the other six teams should come from the Big XII, and the only teams outside the SEC and B1G who have any business being considered one of the seven best at-large teams are Miami and Notre Dame (in that order). We should not be rewarding teams for avoiding tough competition by granting them playoff spots.