The fact that the resources are not released just by the fact that you deleted something without environment redeployment is not a bug but expected behavior. The problem that you don't see what is going to be deleted does exist. However it is much bigger than that. It goes down to that you cannot see changes history. The same way you don't see what components were just added and never beed deployed or what properties have changed (if we have editing which is also related to this)
The fact that the resources are not released just by the fact that you deleted something without environment redeployment is not a bug but expected behavior. The problem that you don't see what is going to be deleted does exist. However it is much bigger than that. It goes down to that you cannot see changes history. The same way you don't see what components were just added and never beed deployed or what properties have changed (if we have editing which is also related to this)