Don't think they need to add two edges. Donald is basically their "edge" in the sense that he's who they rely on for consistent pressure. Rotating okoronkwo, Lewis, and hollins should be fine at the edge 2 spot. They each made a handful of plays last season. So many just add one edge and the line is fine.
Need some speed at linebacker. Maybe Travin Howard but I could be talked into Baron Browning or Jabril Cox in the draft among others. Or a FA.
I think that's it. They have 4 safteys that they like to play even without Johnson. I think David Long can play the nickel if Hill doesn't get a new contract. Our team is very well put together and ready to compete.