Serious Incident: Boeing 737-8AS, EI-DPA at Faro, 24 October 2011 Report

[deltahotel]

There can be merit in leaving the FO as PF. It avoids the switching of mental models. It allows the Cp to have the QRH. It increases the capacity of the Cp as s/he keeps a monitoring function. None of this stops a changeover of control later on.