TAMU left specifically because of the creation of LHN; they said as much, at the time.
In 2010, when Scott was pursuing the Big 12 six, TAMU was the first to turn him down. Then TX, citing TAMU's decision, stated they were confident in the conference's future and also said no.
When the LHN was created, in July 2011, TAMU who had also been courted by the SEC, indicated they were now open to a change.
To state that the home schedules were a cause for the move is ludicrous as it is false.