This would all be very exciting for most MF shooters. I know that the dual card bit is a constant ask, and the H backs lack of a better screen and USB3 has been hurting them. The -50c chip can do 3fps, and I would actually suggest they do dual U3 SD cards, as while CF is nice, it's not mandatory, and the second row of pins would allow for a much faster data dump from the brain.
Add in an improved wifi client, and they're back in the game.
I would actually ask that the do an H back, for all the 'open H' bodies still out there. Include a battery slot, but come on and give everyone who's shooting an H body with H lenses the ability to shoot with the -50c chip. I would go so far as making it compatible with the H3/H4 bodies as well, just need to keep the pricing inline with the CFV-50c plus a touch (say $12k?).