There are no studios at BCV, but there is availability for 1 and 2 BRs for about 50% of the month. May is Flower and Garden, an Epcot destination, not MK. It is also still school time, and in my experience one of the slowest times of the year. If MK was the big draw, I suspect you would also see more people switching from VWL than what we see so far. There were still rooms available at BLT around July 4th weekend before PVB booking started, so I suspect there was availability at BLT in May then too. I suspect a lot of people switched from VGF, too. Both BLT and VGF have monorail access plus have higher point requirements than the other DVCs, so my guess is that is the demographic that is most likely to switch. BLT also has more rooms than BWV or BCV, allowing for a better chance of availability (only the LV studios have good availability in May). In fact the
ONLY DVC with NO availability in May is BWV. That includes VGC, Aulani, HHI etc. I think you are reading too much in to the BLT availability.