Switch And Ditch may be applied when an FPS (First Person Shooter) RPG (Role Play Game) enables the user to spontaneously switch in and out of two classes, or multiple classes, roles.
This term could also be used for the ability to switch out of one class after the developers reduce the performance of that class (nerfed).
Soandso can switch in and out of roles before, during or after combat. We call this a "Switch and Ditch".
Soandso learned their class was nerfed, and subsequently changed their role to a different, applicable class.