Coast at End & Wipe Nozzle features are currently working every-time that a retraction is being occurred. (If I am not wrong)
These features, could very much come in handy, for "Multiple Extrusion". I have come to want these features to occur, not every times a retraction is being initiated, but when there is a tool change.
So my suggestion would be that these two features "Coast at End & Wipe Nozzle" are going to keep being as they are, with an option to enable or disable them at will.
An option that enables the user, to use these two features "Coast at End & Wipe Nozzle" only once, for the end of each layer, before a tool change is going to occur.