BTV is not a cure-all.
True. I guess that
"the potential of reducing runway occupancy time by up to 30 percent"
like any manufacturer's claim, needs to be taken with a pinch of salt
Many people just assume that it is there for, and will be used to, minimise ROT.
One could just as easily see a situation where it is used instead to roll to a further exit than normal for the same ROT as a non-BTV aircraft of the same type.
You need BTV 2.0, where the controller gets to dial in the exit to be used, and the pilot can't do anything about it.