I worry about Tautu's quickness, but I think he can still be effective.
I'm worried that all four of those ILB saw extensive playing time last year. I think they all play hard, but they all showed scary deficiencies last year - Langi's knowledge of the defense, Pikula's tackling, Heder's athleticism, JLD's speed. I really hope they've all improved dramatically, but the only one I am really thinking could have made a leap is Langi, but he missed spring and thus is a little behind the eight ball.