For the record, I am also opposed to Open Only, including being opposed to PP2 open only. I think all modes should remain optional. But some of the rewards in Open should probably be scaled up in some way commensurate to the additional risk.
Personally I think limiting this to PP2 progress would be a great compromise, and a manageable test bed for FDEV for balance.
And how would you deal with console users?
They need a premium service to access anything other than Solo. So If they don't have Playstation Plus or XBox Game Pass, they cannot play Open Mode.