I understand where you're coming from and it's difficult to watch the D sometimes. But the injured LB's and (potential) emergence of Jordan Senn along with the rookie DT's having a chance to get a full offseason of pro workouts and OTA's, we really don't know exactly what we have (and don't have) yet. IMO, the only place on defense that we know for a fact needs an upgrade is FS (Again, this is saying that we don't know what Fua or McClain can be with a full offseason).
My reasoning for Riley Reiff is his potential replacing RT (or LT if Gross flips). It has been stated a few times that Reiff is the best OT prospect in college football, ahead of Kalil. However, Kalil's freak athleticism for the position, versatility (have you seen how many blocked kicks he has?), and last name are going to push him to a top 5 pick. With all this being said, OT is a position of need because of Byron Bell. Bell has shown progress and has become a decent OT but is a penalty machine. Also, Reiff has the potential to be an elite LT whereas Bell's potential is only that of a decent starter or respectable backup.
In the same breath, you need to give Otah the chance to fully heal from his knee surgery. If Otah is the same player we had two years ago, do you agree that OT becomes way less of a need? If Otah fails again next year, OT will be our top pick in the 13' Draft. I think Hurney and Rivera have every intention of allowing Otah prove that he can come back at a high level.. and if he doesn't I think they are fine with Byron Bell for one more year considering his progression.
If you think about it, Otah has only had 1 injury that has kept him out for any long duration of time.. it's this darn knee injury. Sure, he has had some back pain, and shoulder pain.. but nothing he couldn't have played through. It's one singular injury, and most people want to label him injury prone for a single injury. I want to give the guy one more chance, because we all know how dominant he is when healthy.
Based on Rivera's comments in prior press conferences, I tend to believe that we will be drafting defense, early and often.