Programming the Slide Master

It would be helpful to be able to add triggers, actions, and layers to the Slide Master, but then customize the actual sequence of actions on the slide itself. 

For Example -- I would like to be able to create layers within the Slide Master, but the have a trigger on each individual slide using that layout to show the applicable layer at a designated cue point on the individual slide, instead of having having only the base layer on the Slide Master and having to build each layer on each individual slide. I can create the base layer layout within the Master, but will have to program each individual slide's layers, cue points, and triggers. If we could build the Slide Master, with the layers, triggers, and cue points, etc. then all we would have to do is customize the slide (i.e., adjust the cue point, so the associated layer or action could be synched with the audio track.)