If Bears really are going all in, although Warford was relatively weak on pass protection, noted as the 2019 went into the playoffs, relative to Ifedi and Coward, Warford appears to be a significant upgrade.
PFF:
RG: Warford 73.1
LG Daniels 69.9
C Whitehair 64.9
T Spriggs (64.7 2018)
RT Massie 63.2
RG Ifedi (58.8 playing as a RT)
LT Leno 58.6
Can Ifedi be cut? At what cost?
Would Warford really not be able to play Nagy's zone-blocking as well as Ifedi or Coward? I kinda doubt it.
But maybe the Bears feel really good about Alex Bars, whom the Patriots tried to sign off the Bears PS.