A common issue I have when detailing is needing to hide a wall in a detail view. It seems this could be very easily remedied by providing an system instance parameter in the wall families which would allow one to make the wall terminate without having to unjoin walls, etc... In the eclosed snipped image, both walls are unjoined, but because wall wrapping is turned on as a type parameter, there is not a way to easily terminate the wall and prep it for detailing.
Any additional thoughts on how to remedy this are much appreciated.