I'd also play Robertson at LB unless he has actually lost a leg. I'm not as down on Klavan, but that's in comparison to Lovren. If Gomez needs a spell or if he falters, I'd definitely turn to Klavan next. That being said, both he and Lovren wouldn't make it past the summer (or January depending on the market) if I had a say.
Robertson has played pretty well when he's been out there.