Sure, let the FO fly whilst you manage.....but when it comes to the landing in 99% of cases it should be the LHS that does it. You're in that seat through experience and are ultimately responsible. If it all went wrong on touchdown that's too late to intervene.
How would you justify your decision to let 2nd in Command carry out the most critical task? Could the Commander be sued personally under such circumstance through dereliction of duty?
@MrSnuggles - not really like for like. The BA 777 only presented its issue at about 400' on final - hardly a planned non normal landing. As situations go that's about as dynamic as it gets!
A4
PS Do we actually know for sure it was the FO who landed?