The CO-VS arrangement has indeed changed and no longer is a hardblock.

You could certainly get FD miles on CO-coded VS flights at the time of the hardblock.

I have not seen any announcement of any change in FD rules, so I assume that you can still get FD miles for CO flights. I hope so, as I just booked a flight which includes a CO-coded IAD-LHR on VS in UC and I would hate to see those miles go to waste... Presumably, as a CO-coded flight, I could not have them credited to BD, even though it is a VS metal flight?