I actually think Bush could be the missing piece in Det. I have always thought Bush was overrated, but that could work in the Motor city. Spread out, Reggie with space, could work. They haven't had a steady back in years. They all get hurt.
RM in AZ? Will be an afterthought. Could get a couple of 1,000 yard seasons, but that doesn't mean that much these days. I don't see any one FA signings as changing the NFL landscape, but Boldin could.