1.  Add separate methods into WsWorkunits for WUQuerysetQueryDelete/WUQuerysetQuerySuspend/WUQuerysetQueryActivate
2.  Inside each of these methods, they will simply call this.WUQuerysetQueryAction with the correct action/content.
3.  Move all the XML "stuff" inside the WsWorkunits source file (you can probably then let WUQuerysetQueryAction provide the outer XML and each individual method provide the "inner" XML?