You forgot to add ....
FS .... With Coleman released (Im not upset about it in the least) The Texans had a rookie at FS in CC.Brown who is better suited to playing SS. This is a need position.
CB .... Unless you think P-Burnt Toast .... I mean Phillup Buchannon is going to be able to get it together (all signs point to this not happening .... ever) This is a position of real need , Faggins is a capable Nickle but not starter material .
MLB .... Wong would probably be the starter if he werent coming back from injury .... this position is VERY THIN
OLB.... Babin and Peek are projected to move to weakside DE , this leaves Morlon Greenwood and who else ?
DE .... With the aquisition of Weaver the strong side DE position is almost certianly locked down but lacks depth .... Babin and Peek have yet to play a down at the weakside in the NFL ..... There HAS to be a back-up plan in case they fail to produce.
As for the offense ....
WR .... Bradford is gone (/Cheer) Gaffeny is an UFA D.Armstrong is an RFA That leaves them with AJ , Jerome Mathis , Donovan Morgan and Kendrick Starling ..... Only AJ is a proven NFL WR.
The other things on the offensive side I think you listed ....