Why would you compete with VX's and AU's when the winning is done in BA's and VY's?
(and yes.. I know Mr Beikoff won in an AU this year)
The plan to run the HPDC cars as reskinned VX's (with VY trip but VX underpinnings) would have kept the cars current shape, yet retain the cost effectiveness of the VY product....
... but the Kelvinmonster and his mob knows best