The requirement for a Takeoff alternate has become a 'little' Passe at the moment.Originally it was required if low weather precluded a return..
Nowadays ,with the use of Cat3OEI,one would be hard pressed to explain to the chief Pilot why one went to the said Alt'.The only explanation would be that'operationally'the airport didn't meet Cat3 requirements at the time of return.The old Pax Heart attack simulator exercise,just after TakeOff..