My company used to have the F/O´s flying the CAT 2 apps, but then it was moved to the captain. Reason given was that a switching of controls is better under more relaxed cincumstances. In sims, there were alway instances of premature ejacul... sorry, go-arounds if the captein hesitated a little at minimums. Now the old man does the approach (actually George does) and he is on the lookout and the wheel throughout the last phase. The F/O is glued to the instruments all the way down. We are very happy with this arrangement and beleave it is working very well.
MB.