I am late in entering this thread, however, I agree to a major extent, dummies are just that, Dummies. The ones offered early on had no operating couplers with TMCC/Legacy and no directional lighting. The only Dummy I like and still really do, is the CSX AC6000 Super Bass, 610, as it really adds depth and great sound to the lash up. I call that Lash Up, Rolling Thunder.
So, if Lionel, or MTH, Or Atlas O, would add the directional lighting, sound, (Bass), smoke, crew talk, Working couplers, etc. Then the story would say , Wow, Do I Love My Diesel Dummies!!!
Enjoy Labor Day!!!!