Texas demographics are changing. I don't know if they would be able to add eight right senators now, and definitely not in the future. Of course that may depend on a definion of right (right of center or right of Bernie) .
Hispanic people are more likely to attend religious services at least once week and to pray daily: https://www.pewforum.org/religious-landscape-study/racial-an.... Hispanic people strongly support school choice: https://www.nationalreview.com/2018/11/school-choice-strong-.... Hispanic people list preventing terrorism as a top priority, alongside education and higher than healthcare or immigration: https://www.pewhispanic.org/2017/02/23/latino-priorities-for.... Among Democrats, Hispanic people are much more likely than whites to list the economy as the issue that "matters most" and much less likely to list the environment: https://www.nytimes.com/2019/06/06/business/economy/black-de....
Another key issue is aging. The median age for Hispanic people is 28 (squarely millennial), versus 42 (later side of Gen X) for non-Hispanic whites. That means, to a significant degree, the more liberal attitudes you see for Hispanic people as a group are a function of age and generational membership. Everyone gets more conservative with age, and you will see that same trend among Hispanic people.
Trump managed to get 28% of the Hispanic vote, despite running on an aggressively anti-Hispanic and anti-immigrant platform: https://www.politico.com/magazine/story/2019/02/24/2020-hisp.... His approval rating among Hispanics is now 35-45% depending on the poll. Greg Abbott won re-election in Texas with 42% of the Hispanic vote. Due to the various factors discussed above, I think the increasing Hispanic representation in the Texas vote is going to have much less of an impact than people assume.