Unfortunately, there is no standardized way to set up shaders that will work for all lighting situations.  And given that there are perhaps dozens of permutations that result in the same outcome, you will hard pressed to be satisfied all the time.  Vendors want to put out new content as often as they can and they don't want to go back and recreate updates for outdated products.  Believe me, some vendors simply don't know their way around the Material Room and are stuck in the same outmoded method of production.