IMO our "ILBs" are going to be Kiser / Rapp. Rapp was exceptional in run support last year and he can cover far better than the rest of the LBs.
Only exception to that will be the best run games. And even there I don't know that any of the ILBs will be better than Rapp in run support. He's not a stack and shed guy, but his instincts and ability to quickly diagnose help him there.
I know we will do that frequently, but I'm not sure we're going to use that set up as much as we did under Wade. Rapp needs to be on the field, and he surely will as now he's the starting safety along with JJ.
But honestly I'm not so sure that putting an extra safety, who would be a rookie.....or one of our smaller Nickel CBs, which all of them are smaller..... I'm not so sure that using those type of formations as much as we've done is the past is the a better option that using an ILB that can play the pass, and withstand downfield blocks in the run game. That was a problem for us. Late last year when Howard starting getting more time on the field, and we used 2 ILBs more, we seemed to be a more stout defense.
We do have versatility to use a variety of formations which is a good thing, but I'm hoping that we keep our ILBs on the field more under our new DC.