Move Hali back to LDE, get him to add some weight back. Houston moves to ROLB in the DT mold, with a run stuffing RDE inside him (who that is i'm not sure at this point). We've got Poe and Powe and Smith and all kinds of other big DT types to move inside, and quite likely some of them might function well in the RDE role w/ pass rushing as secondary. DJ as MLB or LOLB and use Siler or draftee at Mike.
We do need a CB and FS in the draft and/or FA, and additional pass rushers off the bench are a MUST!!
I think it could work well in a couple years.