Rehiring Robert Saleh.
Signing Mac Jones as QB2.
Switching from Moody to Eddy Pineiro.
Aside from the draft and the starters designated to return, those three moves above have put the 49ers in a position to make one more move: Trade for an upper tier big DE to stand in for Nick Bosa.
The candidates:
Trey Hendrickson 30 yrs old, this year only @ $16M Conditional 3rd
Jaelan Phillips 26 yrs old, this year only @ $13M 5th rounder
Bradley Chubb 29 yrs old, 2 yrs @ $31M 5th rounder