The next HC, like any other, will get the right to evaluate present staff and then make changes. He'll live with a few FO favourites in year one, and bring in people he knows and trusts, like any other HC.
A year down the road, he'll be looking for more control over coaching staff and the grocery shopping, like HC's in the past and present.
And, like any HC, he'll want a final, in cooperation with his coordinators, say on the 53.
That's what quality HC's demand and get. (IMO)
The Cards made changes to the FO last spring and adjusted responsibilities. These have yet to tested in an offseason. Doubt that there'll be any changes in Graves', Keim's or Licht's roles until that's been tested.