This requires the FO to be heads down and pretty much out of the loop as the aircraft approaches the hold with converging traffic, frequency changes and takeoff instructions etc.
Agree with this 100%
My company does SE taxi, and the delayed items (flight controls, SEC resets etc) combined with the long checklist, have cause me to be heads down until practically reaching the runway on several occasions.
Of course, if the other fellow messes up the taxi instructions, I'll be called into the office as well.