Well, it's a number of things.
If Reggie performs just as good as last year he will call for a big contract, and Miller was drafted to replace him.
I think it all depends on how our other 2 RB's perform. Jury is still out on D. Thomas and it seems Miller and Reggie fit the WCO scheme better.
If anything I see D. Thomas getting traded and keeping Reggie and Miller.
Then again, I personally wouldn't get rid of any. Reggie and Miller provide great pass catching RB's and Reggie's versatility makes him gold in the WCO. Thomas is the power back we need (hopefully he steps it up), unless Massam impresses.
I think you are right here.
The Fins could give more attempts to the rookie and DT to keep Bush's production down and thus his pontential next contract down.
Probably wouldn't happen but it has happened in the past in the NFL.