I agree that the cabin will look messy. I'm a bit of a perfectionist and always make sure the seatpocket items are in the correct order and seatbelts crossed on every turnaround. No one likes change and we have these discussions everytime something is changed.
What I don't understand is the logic that not putting a sick bag in will save time. If you are replacing magazines you generally replace mags and sick bags together. At my base we do our seats and put tables down if something needed in a pocket, then 2 collect rubbish and 2 replace mags and bags so it's all done at the same time. Also pax can be called once security complete it sometimes takes ages for a bus to arrive so you can replenish then.