Yeah, I think that Eisworth will be back to prove he can stay healthy. I don't really believe he's shown he is a draft pick at this point, but who knows? IMO next year's starters are Eisworth, White and Miller.
Scouting reports have been pretty positive on Eisworth. I saw a mock draft that had him going in the 3rd round. I think he would be more of a 5th rounder because of the injuries, but he could really increase his stock if he returns for his senior season and stays healthy. Honestly I could even see him going as high as round 2.
Don't forget about Spears in the running for the strong safety spot. Azunna could maybe play there as well and we have Bowens, who is primarily a free safety but who knows with the way the coaches move secondary guys around, and there are some youngsters like Isheem Young that could compete for the starting job vacated by Lewis/Bickham.
For the record, I'll be glad to not have Bickham next year. He's in the right spot most of the time but he can't tackle. I am a big fan of Lewis though and will miss him next year.