My thoughts on having one type of crew is that this is what has been needed for a long time to bring better efficiencies and flexibility to the operation. Having one crew type won’t tick everyone’s boxes but it will align the business with other airlines across different markets.
Regarding the possible closure of LGW this could also be a wise move, leaving LGW to the LCCs and charter operators. As and when demand returns that necessitates more services from LGW and more competition, BA could always do w pattern operations from selective destinations around Europe.