The o-line isn't as bad as people think. It's not great or good by any means. But it isn't terrible. Kubiak will be using 3 step drops most of the time to compensate for it's below average status. I think he will be alright. Plus, if you watched any Texans games last season, you will know that Carr was responsible for a majority of those sacks. If any QB in the league constantly holds the ball for as long as he did, they would be sacked as much as he was.
Even then, they were 9th in the league in sacks allowed. Hasselbeck was sacked more than Carr. The o-line will be alright.