I don't have a 2014 and I could be way off base, but this makes sense to me.I don't know if anyone else can relate to this, but I have noticed that the weird engine braking sensation while coasting seems to be greatly reduced. This sensation used to drive me nuts when I first got the van, since I had upgraded from a non VCM Odyssey. It seems to coast much easier now without VCM activated.
With VCM enabled, the VCM cylinders are unpowered while decelerating and so they would add engine drag.
With VCM disabled, the VCM cylinders are powered at low RPM while decelerating and so would add less engine drag.
I recently rented a Chevy Cruze that aggressively slowed down when I took my foot of the gas. While the car was impressive in all other respects, I did not like this feature.