I see no upside for him that he cant get in Houston. But players have lives outside of football, maybe he doesnt like the social vibes in Texas. I believe he had been looking at the Jets, even before they hired Saleh. If I were the Jets or the Dolphins, I would trade the starting QB to Texas and add a first and second rounder, to get Watson, I believe that would close the deal. Houston is likely going to have to eat some of Watsons contract.
Houston needs to do something about its defense, a team cant count on scoring 38 points per game to win. This where I believe the new coach may prove to be a diamond in the rough. He has a good relationship with the great Ozzie Newsome, one of the most underrated GMs in history, IMO. The new coach can focus on picking up some late round monsters that can work well with the declined, but still very good JC Watt to make the defense a factor. Remember Jerry Rice was an unknown out of Mississippi Valley State, Tom Brady was a sixth rounder. If you look at the history of early rounders versus middle rounders, it has been a hit and miss situation, lots of middle rounders have turned into stars, even HOFs. So, IMO, draft position in the first 5-6 rounds is grossly overrated, the key is the staff doing the drafting having an eye for talent, that is something that Bill Walsh excelled at, drafting a blocking back out of Nebraska because he saw a star NFL running back, and got it, drafting an unknown guy named Jerry Rice, drafting three unknown rookie defensive backs to go with the higher drafted Ronnie Lott.
It looks like Houstons new coach is a guy who doesnt have such a big ego that he wont hire under-appreciated, but very good offensive and defensive coaches, maybe he will raid Baltimore the way the Miami coach did New England.