If I'm Ireland, I make low ball offers to most, if not all, of our free agents and see who really wants to stay in Miami. With playing Bush, I put him in the backfield with Miller and/or Thomas and from time to time split him out, making them cover him with a LB. This could be really effective with he and Clay in the backfield, as they could go for a power run, needing the defense to bring big guys in, which if they do, you can spread both of them out. If they leave extra DB's in, them you run vertical on them.
I would MUCH rather see some sort of double tight sprint sweep to Bush off a fake dive to Miller on 3rd and 1 (much like we did with Ricky out of wildcat formation) than another season of Javorskie Lane running head first into the back of the OG for a loss of two! Re-sign Bush for the sake of playmaking options