It would make more sense just to do a split buy with the A, rather than carving up the B. This was also a plan, but since scrapped by the Mod on account of once bitten twice shy with regard to the mess with the B/C switch and switch back. Also, suspect there will no longer be enough bought for 'carrier' and 'non carrier' specific airframes.
John, I get what you say about the 2048 OSD. Unfortunately the recent precedent has been to bring forward OSDs - Jaguar, Harrier, Tornado, C-130J - rather than to put them back.