Whilst on the phone to the Gold line this morning I queried my MAN>LHR>MIA itinerary in Feb/March. As there are three of us currently on Row 1 (my three year old son is in the 'E' seat and on a separate yet linked booking) for the MAN>LHR leg I asked about when the switch is happening.
The agent was pretty adamant that as it's only gone to the shareholders, it's unlikely to come in in Q1 2017. Surely it has to chime in with the arrival of BoB as others have said. Nothing like planning eh?