Texans or any football organization will always have needs. One concept that is hard to diagnose are cap ramifications as player career's transcend, evolve in scheme, clubhouse impact on field production. Can they be replaced & what is the cost? Texans draft based on best player available who can help improve/sustain team. So in essence it could be any position if that player is deemed best player on their board.
WR, NT, ILB, DE, OT, CB & Safety are all valued positions, could be any of them, whoever falls into their laps. My focus & others who study the draft are to find & select elite talent who fit on this team. It's not enough just to say he has a high motor, prospect should also have athletic ability to become a play maker. Speed alone won't cut it, must also block, run correct routes & play smart. A prospect can plug the middle but also demonstrate ability to penetrate & collapse the pocket. Linemen maybe asked to kick inside or play outside so versatility is a plus. A corner who can play on an island yet physical with size & competent in run support or blitz the QB another favorite.
For each position they are layers of skill sets Texans grade out as important, ultimately built into their draft grade so when the moment comes in April all the research & evaluation allow them to see clearly in the ultra competitive environment that is the NFL Draft.