If my memory is correct CCV has some of the smallest studios as they are converted hotel rooms, I believe they are even slightly smaller than BCV. We stayed in one in April, and it would have been very tight with the bed pulled out. I don't think anyone can say anything about DVC interest yet, as CCV is not sold out so Disney still owns quite a bit of inventory at the resort, but it has been selling quite briskly.
CCV studios are converted WL hotel rooms so are on the small side.
However, we left the sofabed pulled out the entire time and still had plenty of room fro two adults, including for an ECV in the room.
This 3D view of the CCV studio rooms will give you an excellent idea of the space. The sofa footprint isn't longer than the area rug. https://my.matterport.com/show/?m=Zp7gtUdZMZy