I think the Texans lack for only about 4-5 positions next season , in no specific order .
Defensive End to replace an aging Gary Walker who is makin a load of money and just not performing . Marcus Spears would be interesting . Not sure he fits the 3-4 ....
Cornerback Aaron Glenn is not getting any younger , his salary is also quite large . Antrel Rolle , Carlos Rogers , Marlin Jackson ??
Inside Linebacker Someone to complement J.Sharper that can actually plug a gap instead of makin tackle 5 yards downfield . Derrick Johnson .... yeah im dreaming on that one
Running Back Dominic Davis , Tony Hollings , Jonathan Wells have all been given a some time to show what they can do , None of them has really shown they can be an Every Down back and collectively havent gotten it done . Cedric Benson , Carnell Williams , Ronnie Brown any of those would be fine by me or possibly Maurice Clarett on day two .
And the O-Line which i think will not see much change from this season to next considering the upgrades made last season and the new blocking scheeme they implemented . although depth never hurts in the trenches . If anyting here i'd like to see the Center position addressed .
Many of the named i mentioned would likely require some movement upwards in draft position unless the Texans just fall flat

on their faces the rest of this season . (wouldnt bother me if they did , Remember the Rockets purposely losing games to win the rights to Akeem ? ...errr is that Hakeem ?)
a plea to Charley Casserly .... Please No More QB's or TE's ....... or QB's to be moved to Saftey
One more NEED , a coaching staff that Plays to WIN , not keep it close
Assuming they address all these needs via free agency or the draft they could compete for the division next season and for several seasons to come .