Just wondering how important that is to everyone. When I set my 600's up in there soft boxes or umbrellas I already know the zoom length I will need for maximum light dispersion. I just use the STE3 to select the type of mode I want and flash duration. I suppose that when you are trying for effects like narrowing the beam for rim lighting effects or other stuff it makes a difference. I don't do much of that so it does not bother me. I really like the system.
+1. Zoom setting for off-camera flash is based on spread of light needed into the light modifier. The modifier distributes light onto the scene. If you're using a naked flash then you'd usually only adjust zoom is when moving your light stand so you'd be at the flash anyway.
Eos: 1Ds-III, 5D-III, 6D, 60D | Canon EF: TSE-24L-II, 16-35L-II, 24L-II, 35L, 40STM, 100f/2.8, 135L | Wishlist: TSE-17L, 200f/2L
Tamron: 24-70VC, 70-200VC, 150-600VC | Samyang: 8mm-T3.8, 14mm-T3.1
Crazy Ideas: TSE-90L-II, 40f/1, 100f/1.4, 35-85f/2, 100-300f/4_1.4xInt, 500f/5.6_1.4xInt