It seems to me a mechanically sympathetic rider doesn't need any help, at least not on a Bosch or Yamaha bike.
I couldn't agree more.
I let alot of people ride my bikes, and quite frequently I'll be pedalling along side cringing as I hear gear changes, and or poor riding practice.
I just take it for granted that you select the correct gear before approaching a hill, and down shift when approaching junctions, or coming to a stop. Odd how people treat riding a bike differently to how they would drive a vehicle. I'll often be with someone at a stop, and glance at the rear cassette and see that they have pulled up to stop in top gear. I sometimes wonder whether the motor, makes people slightly complacent, and they somehow forget that they are actually riding a bicycle, that also just happens to have the added benefit of assist.
Like you, I will also ease or lift before changing gear. It doesn't make riding any slower, and it certainly makes gear selection smoother.