I find it much disturbing if the flight attendants switch on the cabin light more than two hours before landing to start preparing the breakfast in the galley. Just use the galley lights! On my next flight I will ask the purser to avoid that. Let‘s see what her/his reaction is.
And regarding the electronic shades: It makes perfect sense to switch them off centrally before landing. And on a night flight I also appreciate if they dimm the shades on the sunrise side of the plane. Not to sleep but to see something on the TV screen.
