I lived in Texas for 7 years, many friends are fans of A&M, Baylor and UT. When Texas fell on hard times, my resentment for them tempered a lot due to seeing those friends' frustrations. I didn't hate them in the college football playoff. I also think Sarkisian is a good coach. And I respect Arch Manning for not being a primadonna.
The SEC will be tougher than the B12 was, but I think Texas is actually pretty well prepared. Alabama is poised to make a slide, but other than Georgia and LSU, I don't see a team in the SEC that looks to be on Texas' level. They'll probably be vying for conference championships from the get-go.
Its hard to play all new teams, without having the reference from prior years in your week-to-week preparation. But now that conferences are getting so big, that is less of a disadvantage since most teams are playing several opponents the didn't play last year.
If any team is about to have a rude awakening, its Oklahoma. They're about to be a middle-of-the-pack team in the conference. And I don't have the faith in their current coaching to think they can build/recruit their way out of it.