Yes it will be applied to player as well. I do not know how we inform player currently when one of his mercenaries leave. Is it stated at left bottom comments? If not it can be good adding some kind of information there.
please do not add any more information to the bottom left comments. Also there is no way to scroll up and review the log like in warband. That entire window is easy to miss important info especially if you are fast forwarding the game speed. Something like this should be a right hand screen pop up buttons imo.