Ike is a good corner. But the scheme is showing his weaknesses. He's definitely lost a step which is why LeBeau had him 10 yards off the receivers constantly.
Secondary is better without Troy which leads to other questions. Move to 43 and Troy as an OLB? Seriously. Not a bad idea. It's basically what he does now anyway. Atleast moving him to that spot would allow us to have another safety rather than forcing Clark to cover the entire field.