Making changes/modifications to a model with multiple configurations.

I am having a hard time finding a good design flow when the client keeps wanting changes. I have multiple configurations in my model in order to display different things in my drawings. but if the client wants to make a change, remove something, add a new component, etc I find myself with a model full of red, or yellow and with messed up configurations and mates. Is there a way to curb this instead of going back through each individual mate and configuration?

SolidworksModeling And Assemblies