The only one of those guys I would like to see cut is Poppinga. He's not a 3-4 OLB. Justin Harrell needs to be cut too.
I would like to see Barnett traded if they can get something decent for him, or kept if they feel he's not going to be a distraction(I would trust TT's judgement here).
I think Tauch gets the chance to try out, and it will be up to him to decided if he wants to give it another go or retire. He could make the final roster but end up on IR again, I dont think its too likely he will be cut.
Chillar provides good ILB/OLB depth and options for sub-packages, and doesn't cost too much to keep, he shouldn't be cut if healthy.